subject:(spin orbit coupling)

Boston College

1. Walkup, Daniel. Doping and strain effects in strongly spin-orbit coupled systems.

Degree: PhD, Physics, 2016, Boston College

URL: http://dlib.bc.edu/islandora/object/bc-ir:106810

► We present Scanning Tunneling Microscopy (STM) studies on several systems in which spin-orbit coupling leads to new and interesting physics, and where tuning by doping… (more)

▼ We present Scanning Tunneling Microscopy (STM) studies on several systems in which spin-orbit coupling leads to new and interesting physics, and where tuning by doping and/or strain can significantly modify the electronic properties, either inducing a phase transition or by sharply influencing the electronic structure locally. In the perovskite Iridate insulator Sr3Ir2O7, we investigate the parent compound, determining the band gap and its evolution in response to point defects which we identify as apical oxygen vacancies. We investigate the effects of doping the parent compound with La (in place of Sr) and Ru (in place of Ir). In both cases a metal-insulator transition (MIT) results: at x ~ 38% with Ru, and x ~ 5% with La. In the La-doped samples we find nanoscale phase separation at dopings just below the MIT, with metallic spectra associated with clusters of La atoms. Further, we find resonances near the Fermi energy associated with individual La atoms, suggesting an uneven distribution of dopants among the layers of the parent compound. Bi2Se3 is a topological insulator which hosts linearly dispersing Dirac surface states. Doping with In (in place of Bismuth) brings about topological phase transition, achieving a trivial insulator at x ~ 4%. We use high-magnetic field Landau level spectroscopy to study the surface state’s properties approaching the phase transition and find, by a careful analysis of the peak positions find behavior consistent with strong surface-state Zeeman effects: g~50. This interpretation implies, however, a relabeling of the Landau levels previously observed in pristine Bi2Se3, which we justify through ab initio calculations. The overall picture is of a g-factor which steadily decreases as In is added up to the topological phase transition. Finally, we examine the effects of strain on the surface states of (001) thin films of the topological crystalline insulator SnTe. When these films are grown on closely-related substrates—in this case PbSe(001)—a rich pattern of surface strain emerges. We use phase-sensitive analysis of atomic-resolution STM topographs to measure the strain locally, and spatially-resolved quasiparticle interference imaging to compare the Dirac point positions in regions with different types of strain, quantifying for the first time the effect of anisotropic strain on the surface states of a topological crystalline insulator. Advisors/Committee Members: Vidya Madhavan (Thesis advisor).

Subjects/Keywords: Spin-orbit coupling

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APA (6^th Edition):

Walkup, D. (2016). Doping and strain effects in strongly spin-orbit coupled systems. (Doctoral Dissertation). Boston College. Retrieved from http://dlib.bc.edu/islandora/object/bc-ir:106810

Chicago Manual of Style (16^th Edition):

Walkup, Daniel. “Doping and strain effects in strongly spin-orbit coupled systems.” 2016. Doctoral Dissertation, Boston College. Accessed January 23, 2021. http://dlib.bc.edu/islandora/object/bc-ir:106810.

MLA Handbook (7^th Edition):

Walkup, Daniel. “Doping and strain effects in strongly spin-orbit coupled systems.” 2016. Web. 23 Jan 2021.

Vancouver:

Walkup D. Doping and strain effects in strongly spin-orbit coupled systems. [Internet] [Doctoral dissertation]. Boston College; 2016. [cited 2021 Jan 23]. Available from: http://dlib.bc.edu/islandora/object/bc-ir:106810.

Council of Science Editors:

Walkup D. Doping and strain effects in strongly spin-orbit coupled systems. [Doctoral Dissertation]. Boston College; 2016. Available from: http://dlib.bc.edu/islandora/object/bc-ir:106810

University of Texas – Austin

2. -5176-5677. Investigations into the biosynthesis of the nitrogenase cofactor, and the donor and magnetic properties of novel group 5 anions coordinated to a paramagnetic metal center.

Degree: PhD, Chemistry, 2020, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/9168

► The reduction of dinitrogen to ammonia is a critical transformation to modern society and is responsible for much of the agricultural advancement over the past… (more)

▼ The reduction of dinitrogen to ammonia is a critical transformation to modern society and is responsible for much of the agricultural advancement over the past century. Industrially, this is accomplished by the Haber-Bosch process, where N₂ and H₂ are converted to NH₃ with the use of high temperatures and pressures; a process which consumes over 1% of the world’s energy annually. This is further exacerbated by the need to generate H₂ from natural gas leading to additional production of greenhouse gasses. The same reactivity is accomplished by nitrogenase at ambient temperatures and pressures, and further understanding of the enzyme could lend insight towards more efficient industrial processes. The cofactor of nitrogenase is highly unique, featuring a carbide (C⁴⁻) ligated to 6 Fe centers. To understand the biogenesis of the unique active site, a set of alkali supported, reduced FeS clusters were synthesized. A closed loop of cluster interconversions was documented, and it was demonstrated that Fe-coordinated PhS⁻ can be converted to S²⁻ under strongly reducing conditions. The all-inorganic FeS clusters further offered the unique opportunity to study radical hydrogen abstraction of a bound methyl thiolate; a process which seeks to model the S-adenosyl methionine mediated carbide formation of the nitrogenase cofactor in NifB. Separately, novel anionic ligands utilizing Sb and P chelated to a stabilizing biphenyl unit were synthesized and coordinated to a paramagnetic Co(I) metal center. The donor properties and extent of translation spin orbit coupling of heavy atoms were investigated utilizing magnetization and near-IR absorption measurements. It was determined that the Sb analogue indeed showed a greater extent of axial zero field splitting (D), which is known to increase with increasing spin orbit coupling. A tentative value for the spin orbit coupling constant [lambda] was also found by utilizing values obtained for μ [subscript eff] and 10 dq. Advisors/Committee Members: Rose, Michael J., Ph. D. (advisor), Que, Emily (committee member), Humphrey, Simon (committee member), Fast, Walter (committee member).

Subjects/Keywords: Nitrogenase; Spin orbit coupling

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APA (6^th Edition):

-5176-5677. (2020). Investigations into the biosynthesis of the nitrogenase cofactor, and the donor and magnetic properties of novel group 5 anions coordinated to a paramagnetic metal center. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/9168

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

-5176-5677. “Investigations into the biosynthesis of the nitrogenase cofactor, and the donor and magnetic properties of novel group 5 anions coordinated to a paramagnetic metal center.” 2020. Doctoral Dissertation, University of Texas – Austin. Accessed January 23, 2021. http://dx.doi.org/10.26153/tsw/9168.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-5176-5677. “Investigations into the biosynthesis of the nitrogenase cofactor, and the donor and magnetic properties of novel group 5 anions coordinated to a paramagnetic metal center.” 2020. Web. 23 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-5176-5677. Investigations into the biosynthesis of the nitrogenase cofactor, and the donor and magnetic properties of novel group 5 anions coordinated to a paramagnetic metal center. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2020. [cited 2021 Jan 23]. Available from: http://dx.doi.org/10.26153/tsw/9168.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-5176-5677. Investigations into the biosynthesis of the nitrogenase cofactor, and the donor and magnetic properties of novel group 5 anions coordinated to a paramagnetic metal center. [Doctoral Dissertation]. University of Texas – Austin; 2020. Available from: http://dx.doi.org/10.26153/tsw/9168

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

University of Arizona

3. Chen, Kai. Spin Transport in Magnetic Nano-Structures .

Degree: 2017, University of Arizona

URL: http://hdl.handle.net/10150/626524

► Since the discovery of giant magnetoresistance in 1980s, Spintronics became an exciting field which studies numerous phenomena including the spin transport in magnetic heterostructures, magnetization… (more)

Subjects/Keywords: Magnons; Spin-orbit Coupling; Spin Pumping; Spintronics

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APA (6^th Edition):

Chen, K. (2017). Spin Transport in Magnetic Nano-Structures . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/626524

Chicago Manual of Style (16^th Edition):

Chen, Kai. “Spin Transport in Magnetic Nano-Structures .” 2017. Doctoral Dissertation, University of Arizona. Accessed January 23, 2021. http://hdl.handle.net/10150/626524.

MLA Handbook (7^th Edition):

Chen, Kai. “Spin Transport in Magnetic Nano-Structures .” 2017. Web. 23 Jan 2021.

Vancouver:

Chen K. Spin Transport in Magnetic Nano-Structures . [Internet] [Doctoral dissertation]. University of Arizona; 2017. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10150/626524.

Council of Science Editors:

Chen K. Spin Transport in Magnetic Nano-Structures . [Doctoral Dissertation]. University of Arizona; 2017. Available from: http://hdl.handle.net/10150/626524

4. Calsaverini, Rafael Sola de Paula de Angelo. Acoplamento spin-órbita inter-subbanda em heteroestruturas semicondutoras.

Degree: Mestrado, Física Básica, 2007, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/76/76131/tde-05122007-160519/ ;

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Neste trabalho apresentamos a determinação autoconsistente da constante de interação spin-órbita em heteroestruturas com duas sub-bandas. Como recentemente proposto, ao obter o hamiltoneano de um… (more)

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Neste trabalho apresentamos a determinação autoconsistente da constante de interação spin-órbita em heteroestruturas com duas sub-bandas. Como recentemente proposto, ao obter o hamiltoneano de um sistema com duas sub-bandas na aproximação de massa efetiva, constata-se a presença de um acoplamento inter-subbanda que não se anula mesmo em heteroestruturas simétricas. Apresentamos aqui as deduções teóricas que levaram à proposição desse novo acoplamento e mostramos o cálculo autoconsistente da intensidade do acoplamento e a comparamos com a intensidade do acoplamento Rashba, já amplamente estudado. Discutimos o método k.p e a Aproximação da Função Envelope e mostramos a obtenção do modelo de Kane 8x8 para semicondutores com estrutura zincblende. Aplicamos o método do \"folding down\'áo hamiltoneano de Kane isolando o setor correspondente à banda de condução. Escrevemos dessa forma um hamiltoneano efetivo para a banda de condução no contexto de um poço quântico com uma barreira. Através da projeção desse hamiltoneano nos dois primeiros estados da parte orbital verifica-se o surgimento de um acoplamento inter-subbanda. Finalmente escrevemos o hamiltoneano efetivo 4x4 que descreve as duas primeiras subbandas de um poço quântico e obtivemos seus autoestados e autoenergias. Finalmente fizemos o cálculo autoconsistente das funções de onda e energias de um gás de elétrons em poços quânticos simples e duplos através da aproximação de Hartree e a partir desses resultados determinamos o valor da constante de acoplamento Rashba e da nova constante inter-subbanda. Entre os resultados obtidos destacam-se o controle elétrico da constante de acoplamento inter-subbanda através de um eletrodo externo e um efeito de renormalização da massa efetiva que pode chegar até 5% em algumas estruturas.

In this work we present the self-consistent determination of the spin-orbit coupling constant in heterostructure with two subbands.As recently proposed, the effective hamiltonian for the conduction band in the effective mass approximation contains an inter-subband spin-orbit coupling which is non-zero even for symmetric heterostructures. We present the theoretical derivation which leads to this proposal and show a selfconsistent determination of the coupling constant. We also compare the magnitude of the new coupling constant with the usual Rashba coupling. Starting with a discussion of the k.p method and the Envelope Function Approximation (EFA) we show the derivation of the 8x8 Kane model for semiconductors with zincblende structure. We then apply the \"folding down\'ḿethod, isolating the conduction band sector of the EFA hamiltonian. By projecting this hamiltonian in the first two states of the orbital part, we find an effective 4x4 hamiltonian that contains an inter-subband spin orbit coupling. The eingenvalues and eigenvectors of this hamiltonian are shown and, specializing the model for single and double quantum wells, we self-consistently determine the inter-subband and Rashba coupling constants in the Hartree approximation. The…

Advisors/Committee Members: Menezes, José Carlos Egues de.

Subjects/Keywords: Acoplamento inter-subbanda; Acoplamento spin-órbita; Inter-subband coupling; Inter-subband coupling; Spin-orbit coupling; Spin-orbit coupling; Spintrônica; Spintronics; Spintronics

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APA (6^th Edition):

Calsaverini, R. S. d. P. d. A. (2007). Acoplamento spin-órbita inter-subbanda em heteroestruturas semicondutoras. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/76/76131/tde-05122007-160519/ ;

Chicago Manual of Style (16^th Edition):

Calsaverini, Rafael Sola de Paula de Angelo. “Acoplamento spin-órbita inter-subbanda em heteroestruturas semicondutoras.” 2007. Masters Thesis, University of São Paulo. Accessed January 23, 2021. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-05122007-160519/ ;.

MLA Handbook (7^th Edition):

Calsaverini, Rafael Sola de Paula de Angelo. “Acoplamento spin-órbita inter-subbanda em heteroestruturas semicondutoras.” 2007. Web. 23 Jan 2021.

Vancouver:

Calsaverini RSdPdA. Acoplamento spin-órbita inter-subbanda em heteroestruturas semicondutoras. [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2021 Jan 23]. Available from: http://www.teses.usp.br/teses/disponiveis/76/76131/tde-05122007-160519/ ;.

Council of Science Editors:

Calsaverini RSdPdA. Acoplamento spin-órbita inter-subbanda em heteroestruturas semicondutoras. [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/76/76131/tde-05122007-160519/ ;

University of Delaware

5. Wang, Tao. Spin orbit coupling induced phenomena in spintronic devices.

Degree: PhD, University of Delaware, Department of Physics and Astronomy, 2017, University of Delaware

URL: http://udspace.udel.edu/handle/19716/23538

► Spin-orbit coupling (SOC) is a relativistic interaction between spin and orbital momentum that induces a plenty of novel phenomena including spin Hall effect (SHE), Rashba-Edelstein… (more)

Subjects/Keywords: Pure sciences; Coupling; Orbit; Spin; Spintronic

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APA (6^th Edition):

Wang, T. (2017). Spin orbit coupling induced phenomena in spintronic devices. (Doctoral Dissertation). University of Delaware. Retrieved from http://udspace.udel.edu/handle/19716/23538

Chicago Manual of Style (16^th Edition):

Wang, Tao. “Spin orbit coupling induced phenomena in spintronic devices.” 2017. Doctoral Dissertation, University of Delaware. Accessed January 23, 2021. http://udspace.udel.edu/handle/19716/23538.

MLA Handbook (7^th Edition):

Wang, Tao. “Spin orbit coupling induced phenomena in spintronic devices.” 2017. Web. 23 Jan 2021.

Vancouver:

Wang T. Spin orbit coupling induced phenomena in spintronic devices. [Internet] [Doctoral dissertation]. University of Delaware; 2017. [cited 2021 Jan 23]. Available from: http://udspace.udel.edu/handle/19716/23538.

Council of Science Editors:

Wang T. Spin orbit coupling induced phenomena in spintronic devices. [Doctoral Dissertation]. University of Delaware; 2017. Available from: http://udspace.udel.edu/handle/19716/23538

University of Toronto

6. Cook, Ashley Megan. Double Perovskites with Strong Spin-orbit Coupling.

Degree: PhD, 2016, University of Toronto

URL: http://hdl.handle.net/1807/76358

► We first present theoretical analysis of powder inelastic neutron scattering experiments in Ba2FeReO6 performed by our experimental collaborators. Ba2FeReO6, a member of the double perovskite… (more)

▼ We first present theoretical analysis of powder inelastic neutron scattering experiments in Ba2FeReO6 performed by our experimental collaborators. Ba2FeReO6, a member of the double perovskite family of materials, exhibits half-metallic behavior and high Curie temperatures Tc, making it of interest for spintronics applications. To interpret the experimental data, we develop a local moment model, which incorporates the interaction of Fe spins with spin-orbital locked magnetic moments on Re, and show that it captures the experimental observations. We then develop a tight-binding model of the double perovskite Ba2FeReO6, a room temperature ferrimagnet with correlated and spin-orbit coupled Re t2g electrons moving in the background of Fe moments stabilized by Hundâ s coupling. We show that for such 3d/5d double perovskites, strong correlations on the 5d-element (Re) are essential in driving a half-metallic ground state. Incorporating both strong spin-orbit coupling and the Hubbard repulsion on Re leads to a band structure consistent with ab initio calculations. The uncovered interplay of strong correlations and spin-orbit coupling lends partial support to our previous work, which used a local moment description to capture the spin wave dispersion found in neutron scattering measurements. We then adapt this tight-binding model to study {111}-grown bilayers of half-metallic double perovskites such as Sr2FeMoO6. The combination of spin-orbit coupling, inter-orbital hybridization and symmetry-allowed trigonal distortion leads to a rich phase diagram with tunable ferromagnetic order, topological C=1 and 2 Chern bands, and a C = 2 quantum anomalous Hall insulator regime. We have also performed theoretical analysis of inelastic neutron scattering (INS) experiments to investigate the magnetic excitations in the weakly distorted face-centered-cubic (fcc) iridate double perovskites La2ZnIrO6 and La2MgIrO6. Models with dominant Kitaev exchange seem to most naturally account for the neutron data as well as the measured frustration parameters of these materials, while the uniaxial Ising anisotropy does not. Our findings highlight how even seemingly conventional magnetic orders in oxide materials containing heavy transition metal ions may be driven by highly-directional exchange interactions rooted in strong spin-orbit coupling. Motivated by experiments on the double perovskites La2ZnIrO6 and La2MgIrO6, we lastly study the magnetism of spin-orbit coupled j_eff =1/2 iridium moments on the three-dimensional, geometrically frustrated, facecentered cubic lattice. The symmetry-allowed nearest-neighbor interaction includes Heisenberg, Kitaev, and symmetric off-diagonal exchange. A Luttinger-Tisza analysis shows a rich variety of orders, including collinear AII type antiferromagnetism, stripe order with moments along the {111}-direction, and incommensurate non-coplanar spirals, and we use Monte Carlo simulations to determine their magnetic ordering temperatures. Advisors/Committee Members: Paramekanti, Arun, Physics.

Subjects/Keywords: double perovskites; spin-orbit coupling; 0611

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APA (6^th Edition):

Cook, A. M. (2016). Double Perovskites with Strong Spin-orbit Coupling. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/76358

Chicago Manual of Style (16^th Edition):

Cook, Ashley Megan. “Double Perovskites with Strong Spin-orbit Coupling.” 2016. Doctoral Dissertation, University of Toronto. Accessed January 23, 2021. http://hdl.handle.net/1807/76358.

MLA Handbook (7^th Edition):

Cook, Ashley Megan. “Double Perovskites with Strong Spin-orbit Coupling.” 2016. Web. 23 Jan 2021.

Vancouver:

Cook AM. Double Perovskites with Strong Spin-orbit Coupling. [Internet] [Doctoral dissertation]. University of Toronto; 2016. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1807/76358.

Council of Science Editors:

Cook AM. Double Perovskites with Strong Spin-orbit Coupling. [Doctoral Dissertation]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/76358

Princeton University

7. Phelan, Brendan Francis. A MAGNETISM-BASED APPROACH TO EXAMINING SPIN-ORBIT COUPLING EFFECTS IN SOLID SYSTEMS OF ISOLATED IRIDIUM OCTAHEDRA .

Degree: PhD, 2016, Princeton University

URL: http://arks.princeton.edu/ark:/88435/dsp01p5547t79h

► This thesis explores the relative strengths of Spin-Orbit Coupling (SOC) in several perovskite-like systems that feature uninterrupted arrays of isolated IrO6 octahedra. Iridate compounds are… (more)

▼ This thesis explores the relative strengths of Spin-Orbit Coupling (SOC) in several perovskite-like systems that feature uninterrupted arrays of isolated IrO6 octahedra. Iridate compounds are particularly interesting to the community due to their relevance to emergent material properties such as insulating antiferromagnets, superconductors, and topological insulators. Recently literature has pointed to a complex interaction between SOC and crystal field splitting (CFS) in d5 metals. I utilize a straightforward, magnetic approach to determine the relative strengths of SOC vs CFS by chemically modifying structure and oxidation state. This contrasts with other work where advanced spectroscopic measurements are utilized to probe energy levels within a single compound. The focus of this study lies in two main methodologies: 1) Tracking the evolution of the Ir magnetic moment on progressing from 5d5 Ir4+ to 5d4 Ir5+ oxidation states that are clearly best described by a transition from a J=1/2 to a J=0 Ir magnetic state. In these cases, the evolution of the magnetic susceptibility shows the dominance of spin-orbit coupling in determining the magnetic properties of a material with highly isolated IrO6 octahedra. 2) Distorting J=0 Ir5+ systems where there is no emergence of an enhanced magnetic moment in the series on increasing the structural distortions, as would have been the case for significant crystal field splitting that reinforces the notion that spin-orbit coupling is the dominant force in determining the magnetism of iridium-oxygen octahedra in perovskite-like structures. The organization of this thesis is as follows: Chapter 1 presents a brief introduction to solid-state chemistry, iridates, and magnetism. Chapter 2 is an overview of experimental methodology and instrumentation. Chapter 3, presents a study of tuning the oxidation state of a new structure type: SrxLa11-xIr4O24. Chapter 4 presents a structural tuning of the Ir5+ system: Ba2-xSrxYIrO6. Finally, Chapter 5 provides a brief glimpse of the future of this new approach to studying this type of iridium-oxygen compounds. Advisors/Committee Members: Cava, Robert J (advisor).

Subjects/Keywords: Iridates; Iridium; Magnetism; Spin-Orbit Coupling

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APA (6^th Edition):

Phelan, B. F. (2016). A MAGNETISM-BASED APPROACH TO EXAMINING SPIN-ORBIT COUPLING EFFECTS IN SOLID SYSTEMS OF ISOLATED IRIDIUM OCTAHEDRA . (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp01p5547t79h

Chicago Manual of Style (16^th Edition):

Phelan, Brendan Francis. “A MAGNETISM-BASED APPROACH TO EXAMINING SPIN-ORBIT COUPLING EFFECTS IN SOLID SYSTEMS OF ISOLATED IRIDIUM OCTAHEDRA .” 2016. Doctoral Dissertation, Princeton University. Accessed January 23, 2021. http://arks.princeton.edu/ark:/88435/dsp01p5547t79h.

MLA Handbook (7^th Edition):

Phelan, Brendan Francis. “A MAGNETISM-BASED APPROACH TO EXAMINING SPIN-ORBIT COUPLING EFFECTS IN SOLID SYSTEMS OF ISOLATED IRIDIUM OCTAHEDRA .” 2016. Web. 23 Jan 2021.

Vancouver:

Phelan BF. A MAGNETISM-BASED APPROACH TO EXAMINING SPIN-ORBIT COUPLING EFFECTS IN SOLID SYSTEMS OF ISOLATED IRIDIUM OCTAHEDRA . [Internet] [Doctoral dissertation]. Princeton University; 2016. [cited 2021 Jan 23]. Available from: http://arks.princeton.edu/ark:/88435/dsp01p5547t79h.

Council of Science Editors:

Phelan BF. A MAGNETISM-BASED APPROACH TO EXAMINING SPIN-ORBIT COUPLING EFFECTS IN SOLID SYSTEMS OF ISOLATED IRIDIUM OCTAHEDRA . [Doctoral Dissertation]. Princeton University; 2016. Available from: http://arks.princeton.edu/ark:/88435/dsp01p5547t79h

University of Delaware

8. Kandaz, Fatih. Anisotropic spin relaxation in mesoscopic nonmagnetic channels.

Degree: PhD, University of Delaware, Department of Physics and Astronomy, 2018, University of Delaware

URL: http://udspace.udel.edu/handle/19716/23597

► Spin–orbit (SO) effects, which are essential for spintronics, not only generate spin currents and spin torques but also provide ways to modulate spin currents. However,… (more)

Subjects/Keywords: Pure sciences; Applied sciences; Magnetism; Spin current; Spin polarization; Spin relaxation; Spin-orbit coupling; Spintronics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kandaz, F. (2018). Anisotropic spin relaxation in mesoscopic nonmagnetic channels. (Doctoral Dissertation). University of Delaware. Retrieved from http://udspace.udel.edu/handle/19716/23597

Chicago Manual of Style (16^th Edition):

Kandaz, Fatih. “Anisotropic spin relaxation in mesoscopic nonmagnetic channels.” 2018. Doctoral Dissertation, University of Delaware. Accessed January 23, 2021. http://udspace.udel.edu/handle/19716/23597.

MLA Handbook (7^th Edition):

Kandaz, Fatih. “Anisotropic spin relaxation in mesoscopic nonmagnetic channels.” 2018. Web. 23 Jan 2021.

Vancouver:

Kandaz F. Anisotropic spin relaxation in mesoscopic nonmagnetic channels. [Internet] [Doctoral dissertation]. University of Delaware; 2018. [cited 2021 Jan 23]. Available from: http://udspace.udel.edu/handle/19716/23597.

Council of Science Editors:

Kandaz F. Anisotropic spin relaxation in mesoscopic nonmagnetic channels. [Doctoral Dissertation]. University of Delaware; 2018. Available from: http://udspace.udel.edu/handle/19716/23597

9. Ilic, Stefan. Quantum coherent phenomena in disordered transition metal dichalcogenide monolayers : Phénomènes quantiques cohérents dans les monocouches désordonnées de dichalcogénures de métaux de transition.

Degree: Docteur es, Physique théorique, 2019, Université Grenoble Alpes (ComUE)

URL: http://www.theses.fr/2019GREAY038

► Les monocouches de dichalcogénures de métaux de transition (TMDC) sont des matériaux bidimensionnels découverts récemment. Ils possèdent un fort couplage spin-orbite (SOC) intrinsèque qui agit… (more)

▼ Les monocouches de dichalcogénures de métaux de transition (TMDC) sont des matériaux bidimensionnels découverts récemment. Ils possèdent un fort couplage spin-orbite (SOC) intrinsèque qui agit comme un champ Zeeman effectif perpendiculaire, mais avec des orientations opposées dans chaque vallée située autour des points +K et -K de la zone Brillouin. En présence de désordre, ce SOC influence fortement les phénomènes quantiques cohérents dans les TMDC. Dans cette thèse, nous étudions deux de ces phénomènes : la supraconductivité et les corrections à la conductance dues aux interférences quantiques, telles que la localisation ou l’anti-localisation faible, ainsi que les fluctuations universelles de la conductance.Une supraconductivité a été identifiée expérimentalement dans plusieurs TMDC, aussi bien dans les régimes dopés n (MoS2, WS2) que p (NbSe2, TaS2). Dans ces matériaux, le SOC intrinsèque provoque un "appariement d'Ising" inhabituel des paires de Cooper. En effet, celles-ci sont formées avec des électrons provenant de vallées opposées, donc leurs spins sont figés perpendiculairement à la couche. Un champ magnétique appliqué parallèlement à la couche n’est donc pas efficace pour briser les paires de Cooper par l'effet paramagnétique, ce qui entraîne une augmentation considérable du champ critique dans le plan. C’est la signature principale de la supraconductivité d'Ising. Dans la première partie de ce travail, nous calculons le champ critique et la densité des états dans les TMDC supraconducteurs désordonnés. Nous montrons que la diffusion intra-vallée n'affecte pas ces propriétés. En revanche, elles dépendent fortement de la diffusion inter-vallée qui produit un mécanisme de brisure des paires de Cooper. Dans les supraconducteurs Ising dopés p, dans lesquels plusieurs bandes croisent le niveau de Fermi, nous identifions la diffusion inter-bande comme un autre mécanisme important de brisure des paires. Nous montrons qu'une faible diffusion inter-vallée ou inter-bande peut expliquer les observations expérimentales dans les supraconducteurs TMDC dopés n ou p, respectivement.Dans la deuxième partie de ce travail, nous calculons les corrections à la conductance dues aux interférences quantiques dans les TMDC métalliques. Leur mesure peut servir de sonde indépendante pour identifier la nature du SOC et du désordre. En raison de l'interaction entre la structure de la vallée et le SOC, ces matériaux présentent un riche comportement de localisation (ou anti-localisation) faible et des fluctuations universelles de la conductance, qui sont qualitativement différents des autres systèmes bidimensionnels, comme les métaux conventionnels ou le graphène. Nos résultats peuvent également être utilisés pour décrire les hétéro-structures graphène/TMDC, dans lesquelles le SOC est induit dans la couche de graphène. Nous discutons différents régimes de paramètres qui permettent d’interpréter des expériences récentes et d’évaluer l’intensité du SOC et du désordre. En outre, nous montrons qu'un champ Zeeman dans le plan peut être utilisé… Advisors/Committee Members: Meyer, Julia (thesis director), Houzet, Manuel (thesis director).

Subjects/Keywords: Supraconductivité; Désordre; Couplage spin-Orbite; Superconductivity; Disorder; Spin-Orbit coupling; 530

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APA (6^th Edition):

Ilic, S. (2019). Quantum coherent phenomena in disordered transition metal dichalcogenide monolayers : Phénomènes quantiques cohérents dans les monocouches désordonnées de dichalcogénures de métaux de transition. (Doctoral Dissertation). Université Grenoble Alpes (ComUE). Retrieved from http://www.theses.fr/2019GREAY038

Chicago Manual of Style (16^th Edition):

Ilic, Stefan. “Quantum coherent phenomena in disordered transition metal dichalcogenide monolayers : Phénomènes quantiques cohérents dans les monocouches désordonnées de dichalcogénures de métaux de transition.” 2019. Doctoral Dissertation, Université Grenoble Alpes (ComUE). Accessed January 23, 2021. http://www.theses.fr/2019GREAY038.

MLA Handbook (7^th Edition):

Ilic, Stefan. “Quantum coherent phenomena in disordered transition metal dichalcogenide monolayers : Phénomènes quantiques cohérents dans les monocouches désordonnées de dichalcogénures de métaux de transition.” 2019. Web. 23 Jan 2021.

Vancouver:

Ilic S. Quantum coherent phenomena in disordered transition metal dichalcogenide monolayers : Phénomènes quantiques cohérents dans les monocouches désordonnées de dichalcogénures de métaux de transition. [Internet] [Doctoral dissertation]. Université Grenoble Alpes (ComUE); 2019. [cited 2021 Jan 23]. Available from: http://www.theses.fr/2019GREAY038.

Council of Science Editors:

Ilic S. Quantum coherent phenomena in disordered transition metal dichalcogenide monolayers : Phénomènes quantiques cohérents dans les monocouches désordonnées de dichalcogénures de métaux de transition. [Doctoral Dissertation]. Université Grenoble Alpes (ComUE); 2019. Available from: http://www.theses.fr/2019GREAY038

10. PRAVEEN DEORANI. TANTALUM AND BISMUTH SELENIDE BASED SPIN PUMPING DEVICES.

Degree: 2015, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/121000

Subjects/Keywords: Spin pumping spin orbit coupling

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APA (6^th Edition):

DEORANI, P. (2015). TANTALUM AND BISMUTH SELENIDE BASED SPIN PUMPING DEVICES. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/121000

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

DEORANI, PRAVEEN. “TANTALUM AND BISMUTH SELENIDE BASED SPIN PUMPING DEVICES.” 2015. Thesis, National University of Singapore. Accessed January 23, 2021. http://scholarbank.nus.edu.sg/handle/10635/121000.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

DEORANI, PRAVEEN. “TANTALUM AND BISMUTH SELENIDE BASED SPIN PUMPING DEVICES.” 2015. Web. 23 Jan 2021.

Vancouver:

DEORANI P. TANTALUM AND BISMUTH SELENIDE BASED SPIN PUMPING DEVICES. [Internet] [Thesis]. National University of Singapore; 2015. [cited 2021 Jan 23]. Available from: http://scholarbank.nus.edu.sg/handle/10635/121000.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

DEORANI P. TANTALUM AND BISMUTH SELENIDE BASED SPIN PUMPING DEVICES. [Thesis]. National University of Singapore; 2015. Available from: http://scholarbank.nus.edu.sg/handle/10635/121000

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto

11. Lee, Kin Ho. Theoretical Progress in Hyperhoneycomb Iridate β-Li2IrO3.

Degree: PhD, 2015, University of Toronto

URL: http://hdl.handle.net/1807/71049

► Iridium-based compounds display a rich variety of physical behaviours that stems from the intricate interplay of many energy scales. In this thesis, we explore the… (more)

Subjects/Keywords: hyperhoneycomb; iridate; Kitaev; magnetism; spin liquid; spin-orbit coupling; 0611

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APA (6^th Edition):

Lee, K. H. (2015). Theoretical Progress in Hyperhoneycomb Iridate β-Li2IrO3. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/71049

Chicago Manual of Style (16^th Edition):

Lee, Kin Ho. “Theoretical Progress in Hyperhoneycomb Iridate β-Li2IrO3.” 2015. Doctoral Dissertation, University of Toronto. Accessed January 23, 2021. http://hdl.handle.net/1807/71049.

MLA Handbook (7^th Edition):

Lee, Kin Ho. “Theoretical Progress in Hyperhoneycomb Iridate β-Li2IrO3.” 2015. Web. 23 Jan 2021.

Vancouver:

Lee KH. Theoretical Progress in Hyperhoneycomb Iridate β-Li2IrO3. [Internet] [Doctoral dissertation]. University of Toronto; 2015. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1807/71049.

Council of Science Editors:

Lee KH. Theoretical Progress in Hyperhoneycomb Iridate β-Li2IrO3. [Doctoral Dissertation]. University of Toronto; 2015. Available from: http://hdl.handle.net/1807/71049

Purdue University

12. Hong, Seokmin. SPIN CIRCUIT REPRESENTATION OF ELECTRONIC TRANSPORT IN MATERIALS WITH SPIN ORBIT COUPLING.

Degree: PhD, Electrical and Computer Engineering, 2014, Purdue University

URL: https://docs.lib.purdue.edu/open_access_dissertations/1075

► Modern nanomagnetic devices involve materials and phenomena featuring both spin and charge transport. SPICE compatible spin circuits with 4-component voltage and current (1 for charge… (more)

Subjects/Keywords: quantum transport; Spin circuit; spin Hall effect; spin orbit coupling; topological insulators

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APA (6^th Edition):

Hong, S. (2014). SPIN CIRCUIT REPRESENTATION OF ELECTRONIC TRANSPORT IN MATERIALS WITH SPIN ORBIT COUPLING. (Doctoral Dissertation). Purdue University. Retrieved from https://docs.lib.purdue.edu/open_access_dissertations/1075

Chicago Manual of Style (16^th Edition):

Hong, Seokmin. “SPIN CIRCUIT REPRESENTATION OF ELECTRONIC TRANSPORT IN MATERIALS WITH SPIN ORBIT COUPLING.” 2014. Doctoral Dissertation, Purdue University. Accessed January 23, 2021. https://docs.lib.purdue.edu/open_access_dissertations/1075.

MLA Handbook (7^th Edition):

Hong, Seokmin. “SPIN CIRCUIT REPRESENTATION OF ELECTRONIC TRANSPORT IN MATERIALS WITH SPIN ORBIT COUPLING.” 2014. Web. 23 Jan 2021.

Vancouver:

Hong S. SPIN CIRCUIT REPRESENTATION OF ELECTRONIC TRANSPORT IN MATERIALS WITH SPIN ORBIT COUPLING. [Internet] [Doctoral dissertation]. Purdue University; 2014. [cited 2021 Jan 23]. Available from: https://docs.lib.purdue.edu/open_access_dissertations/1075.

Council of Science Editors:

Hong S. SPIN CIRCUIT REPRESENTATION OF ELECTRONIC TRANSPORT IN MATERIALS WITH SPIN ORBIT COUPLING. [Doctoral Dissertation]. Purdue University; 2014. Available from: https://docs.lib.purdue.edu/open_access_dissertations/1075

Rice University

13. Balasubramanian, Ramachandhran. Rashba Spin-Orbit Coupled Quantum Gases.

Degree: PhD, Natural Sciences, 2014, Rice University

URL: http://hdl.handle.net/1911/76345

► Spin-orbit (SO) coupling leads to many fundamental phenomena in a wide range of quantum systems from nuclear physics, condensed matter physics to atomic physics. For… (more)

Subjects/Keywords: Spin-orbit coupling; Quantum gases; Rashba spin-orbit coupling; Strongly correlated phases; Exact diagonalization; Dynamical simulations; Collective excitations; Mean-field theory

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APA (6^th Edition):

Balasubramanian, R. (2014). Rashba Spin-Orbit Coupled Quantum Gases. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/76345

Chicago Manual of Style (16^th Edition):

Balasubramanian, Ramachandhran. “Rashba Spin-Orbit Coupled Quantum Gases.” 2014. Doctoral Dissertation, Rice University. Accessed January 23, 2021. http://hdl.handle.net/1911/76345.

MLA Handbook (7^th Edition):

Balasubramanian, Ramachandhran. “Rashba Spin-Orbit Coupled Quantum Gases.” 2014. Web. 23 Jan 2021.

Vancouver:

Balasubramanian R. Rashba Spin-Orbit Coupled Quantum Gases. [Internet] [Doctoral dissertation]. Rice University; 2014. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1911/76345.

Council of Science Editors:

Balasubramanian R. Rashba Spin-Orbit Coupled Quantum Gases. [Doctoral Dissertation]. Rice University; 2014. Available from: http://hdl.handle.net/1911/76345

University of Minnesota

14. Liang, Zhaoxin. Design, Simulation, and Optimization of Spintronic Logic Devices.

Degree: PhD, Electrical Engineering, 2019, University of Minnesota

URL: http://hdl.handle.net/11299/202437

► Over the past 50 years, complementary metal-oxide-semiconductor (CMOS) technology has developed aggressively and has undergone continuous scaling, as described by to Moore's Law. However, as… (more)

▼ Over the past 50 years, complementary metal-oxide-semiconductor (CMOS) technology has developed aggressively and has undergone continuous scaling, as described by to Moore's Law. However, as transistor feature sizes approach the nanometer scale, there have been growing concerns with escalated power dissipation issues in very large scale integrated (VLSI) circuits, as well as device performance/reliability issues under process variations and aging. Meanwhile, emerging consumer electronic markets such as mobile and distributed computing, the internet of things, and autonomous driving platforms have posed various new challenges for the reliability and performance of electronic systems. While mainstream efforts have pushed forward scaling in CMOS technologies, there has been growing research interest in search for replacements for CMOS. Such efforts involve conceptualizing computational devices, based on new physics principles and new materials, that could serve as fundamental building blocks for new architectures, providing diversified computational functionality and offering better performance than the traditional CMOS-based paradigm. Among these beyond-CMOS technologies, spintronics is one of the most promising candidates for building next-generation logic devices. Spintronics takes advantage of an intrinsic property of electrons, spin, and develops the concept of state based on magnetism, which is a physical manifestation of electron spin. However, this new technology requires new simulation frameworks and design methods to be developed and deployed in order to propose and evaluate the potential of new spin-based devices, accounting for the impact of novel material properties that dictate the performance of these devices. Such frameworks can further be employed in determining the dependence of circuit performance on material and device parameters, and in optimizing these new technologies. The first part of the thesis provides a brief review of spintronics and explains a set of physical effects that are exploited to build spintronics-based devices descried in the later chapters. These include spin transfer torque (STT), which forms the basis for early spin-based logic devices, with its associated concepts of spin polarized current and non-local spin valve structure; the magnetoelectric (ME) coupling effect that provides low power and fast switching of magnetization in a ferromagnet (FM) with multiferroic material stacks; domain wall (DW) structures in FMs that can be used for logic transfer; and inverse spin orbit coupling (ISOC) effects, which offer convenient conversion between spin and charge states. The second part of the thesis develops performance optimization techniques for all-spin logic (ASL) devices. A framework for simulating ASL devices is first described, and a method for performance optimization through device sizing is developed. An algorithm for optimal device sizing, based on the geometrical dependence of the energy and delay for the ASL device, is then developed. The results of optimization on…

Subjects/Keywords: all spin logic; logic device; magnetoelectric coupling effect; spin orbit coupling effect; spin transfer torque switching; Spintronics

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APA (6^th Edition):

Liang, Z. (2019). Design, Simulation, and Optimization of Spintronic Logic Devices. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/202437

Chicago Manual of Style (16^th Edition):

Liang, Zhaoxin. “Design, Simulation, and Optimization of Spintronic Logic Devices.” 2019. Doctoral Dissertation, University of Minnesota. Accessed January 23, 2021. http://hdl.handle.net/11299/202437.

MLA Handbook (7^th Edition):

Liang, Zhaoxin. “Design, Simulation, and Optimization of Spintronic Logic Devices.” 2019. Web. 23 Jan 2021.

Vancouver:

Liang Z. Design, Simulation, and Optimization of Spintronic Logic Devices. [Internet] [Doctoral dissertation]. University of Minnesota; 2019. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/11299/202437.

Council of Science Editors:

Liang Z. Design, Simulation, and Optimization of Spintronic Logic Devices. [Doctoral Dissertation]. University of Minnesota; 2019. Available from: http://hdl.handle.net/11299/202437

NSYSU

15. Lin, Tzu-Chen. Orbital Hall effect in k-linear spin-orbit coupled semiconductor systems.

Degree: Master, Physics, 2014, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0611114-212353

► The effective conserved orbital current is composed of the conventional orbital current and the torque orbital current. We use Kubo formula and analytically calculate the… (more)

Subjects/Keywords: Hall conductivity; orbital angular momentum; spin-orbit coupling; spintronics; orbitronics

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APA (6^th Edition):

Lin, T. (2014). Orbital Hall effect in k-linear spin-orbit coupled semiconductor systems. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0611114-212353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lin, Tzu-Chen. “Orbital Hall effect in k-linear spin-orbit coupled semiconductor systems.” 2014. Thesis, NSYSU. Accessed January 23, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0611114-212353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lin, Tzu-Chen. “Orbital Hall effect in k-linear spin-orbit coupled semiconductor systems.” 2014. Web. 23 Jan 2021.

Vancouver:

Lin T. Orbital Hall effect in k-linear spin-orbit coupled semiconductor systems. [Internet] [Thesis]. NSYSU; 2014. [cited 2021 Jan 23]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0611114-212353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lin T. Orbital Hall effect in k-linear spin-orbit coupled semiconductor systems. [Thesis]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0611114-212353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Riverside

16. Lin, Zhisheng. Charge and Spin Transport in Graphene Heterostructures and Cr2Ge2Te6.

Degree: Physics, 2017, University of California – Riverside

URL: http://www.escholarship.org/uc/item/2pt4q4pv

► This dissertation summarizes my past work on hydrogenation of graphene, development of Al2O3 tunnel barrier, pressure effects on Cr2Ge2Te6 (CGT), and proximity effects in graphene/WSe2… (more)

▼ This dissertation summarizes my past work on hydrogenation of graphene, development of Al2O3 tunnel barrier, pressure effects on Cr2Ge2Te6 (CGT), and proximity effects in graphene/WSe2 heterostructures. There are three main parts. The first part is the study of hydrogenation of graphene and the development of atomically smooth Al2O3 tunnel barrier. Graphene device is coated with hydrogen silsesquioxane (HSQ) resist and exposed with electron beam. Graphene is hydrogenated by forming the covalently bonds to the hydrogen atoms and transforms from sp2 to sp3 bonds. By breaking the inversion symmetry perpendicular to the graphene plane, Rashba spin orbit coupling (SOC) is enhanced. We characterized the hydrogenation effects by performing Raman spectroscopy measurements. A clear D and D’ peak grow abruptly with small hydrogenation dosage and keep growing with higher dosage, indicating the increased defects density in graphene. Electrical transport properties are characterized by measuring the gate voltage dependence at different hydrogenation percentages: mobility decreases and graphene becomes more electron-doped upon hydrogenation. The hydrogenation process is reversible, which means the hydrogenation effects are almost gone after annealing. Nonlocal resistivity is 1 to 3 orders of magnitude larger than that of the pristine graphene, which cannot be accounted for by the ohmic contribution assuming uniform graphene channel. The problems of nonlocal measurement method are discussed. The rest of first part is focused on developing the atomically smooth Al2O3 tunnel barrier by sputtering a thin layer of aluminum first and oxidizing it in O2 atmosphere.The second part is about the pressure effects on the magnetic anisotropy of CGT. Magnetoresistance of CGT bulk crystal is measured under applied hydrostatic pressures up to 2 GPa. Upon the application of hydrostatic pressure, we observe an induced transition of easy axis from c axis to the ab plane of the crystal. Furthermore, we observe a reduction of the band gap of CGT by approximately 0.066 eV once the applied pressure reaches 2 GPa. We verify that the magnetoresistance (MR) change originates from anisotropic magnetoresistance (AMR) by measuring the temperature dependence of MR below and above Curie temperature (TC) under the different applied pressures.The last part is focused on the proximity effects in bilayer graphene/WSe2 heterostructures and the pressure induced insulating behavior. The enhancement of spin- orbit coupling is verified by observing the weak-anti localization for the graphene region covered with WSe2 but the weak localization (WL) for the uncovered region. The Rashba SOC strength value extracted from the weak-antilocalization (WAL) fitting is about 1 meV while the intrinsic SOC in graphene is about tens of µeV. It increases by more than two orders of magnitude. Graphene covered with WSe2 shows a strong insulating behavior by applying pressure and the insulating behavior is stronger under higher pressure, which is a signature of a band gap opening. Two…

Subjects/Keywords: Condensed matter physics; graphene; spin orbit coupling; spintronics

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APA (6^th Edition):

Lin, Z. (2017). Charge and Spin Transport in Graphene Heterostructures and Cr2Ge2Te6. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/2pt4q4pv

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lin, Zhisheng. “Charge and Spin Transport in Graphene Heterostructures and Cr2Ge2Te6.” 2017. Thesis, University of California – Riverside. Accessed January 23, 2021. http://www.escholarship.org/uc/item/2pt4q4pv.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lin, Zhisheng. “Charge and Spin Transport in Graphene Heterostructures and Cr2Ge2Te6.” 2017. Web. 23 Jan 2021.

Vancouver:

Lin Z. Charge and Spin Transport in Graphene Heterostructures and Cr2Ge2Te6. [Internet] [Thesis]. University of California – Riverside; 2017. [cited 2021 Jan 23]. Available from: http://www.escholarship.org/uc/item/2pt4q4pv.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lin Z. Charge and Spin Transport in Graphene Heterostructures and Cr2Ge2Te6. [Thesis]. University of California – Riverside; 2017. Available from: http://www.escholarship.org/uc/item/2pt4q4pv

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Santa Cruz

17. Trinh, Jennifer. Low temperature properties of strong spin-orbit systems.

Degree: Physics, 2016, University of California – Santa Cruz

URL: http://www.escholarship.org/uc/item/18b127t2

► Spin-orbit coupling (SOC) is a relativistic interaction between the electronic spin and orbital degrees of freedom. The SOC can give rise to a variety of… (more)

Subjects/Keywords: Physics; low temperature physics; magnetransport; spin-orbit coupling

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APA (6^th Edition):

Trinh, J. (2016). Low temperature properties of strong spin-orbit systems. (Thesis). University of California – Santa Cruz. Retrieved from http://www.escholarship.org/uc/item/18b127t2

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Trinh, Jennifer. “Low temperature properties of strong spin-orbit systems.” 2016. Thesis, University of California – Santa Cruz. Accessed January 23, 2021. http://www.escholarship.org/uc/item/18b127t2.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Trinh, Jennifer. “Low temperature properties of strong spin-orbit systems.” 2016. Web. 23 Jan 2021.

Vancouver:

Trinh J. Low temperature properties of strong spin-orbit systems. [Internet] [Thesis]. University of California – Santa Cruz; 2016. [cited 2021 Jan 23]. Available from: http://www.escholarship.org/uc/item/18b127t2.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Trinh J. Low temperature properties of strong spin-orbit systems. [Thesis]. University of California – Santa Cruz; 2016. Available from: http://www.escholarship.org/uc/item/18b127t2

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

18. Cai, Han. Superradiance and Topological Quantum Optics in Atomic Medium and Cavity QED.

Degree: PhD, Physics, 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/173128

► In this dissertation we focused on two topics: 1. atomic cooperative effect, including superradiance, subradiance and collective Lamb shift in an atomic ensemble; 2. novel… (more)

▼ In this dissertation we focused on two topics: 1. atomic cooperative effect, including superradiance, subradiance and collective Lamb shift in an atomic ensemble; 2. novel topological effect in quantum optics system, such as Haldane model, synthetic magnetic field in superradiance lattice and synthetic spin-orbit interaction in Fock-state lattices. In the first part, we start from the Dicke state, an N-particle atomic ensemble excited by a single photon. Due to the interaction of the atoms with a continuum of vacuum modes, the Dicke state has a larger decay rate compared with an isolated atom, termed the single photon superradiance. In the “opposite” case, the single-photon subradiance state does not decay because of the destructive interference of the atomic transitions. We study the protection of subradiant states by the symmetry of the atomic distributions in the Dicke limit, in which collective Lamb shifts cannot be neglected. We find that antisymmetric states are subradiant states for distributions with reflection symmetry. Continuous symmetry can also be used to achieve subradiance in an extended ensemble. This study is relevant to the problem of robust quantum memory with long storage time and fast readout. In the second part, we start from introducing the concepts, methods, and models from quantum optics or condensed matter physics. They include the timed-Dicke states, electromagnetically induced transparency, coupled wave equations, tight-binding model, band theory, Floquet theory, superradiance lattice, integer quantum Hall effect, Haldane model, etc.. Based upon these tools, we study three topological quantum optics systems: (i) a Haldane model with in situ tunable topological properties in a two-dimensional momentumspace superradiance lattice composed of timed Dicke states in electromagnetically induced transparency; (ii) a spin-orbit coupled Fock-state lattice, which introduce a novel quantum operation to generate mesoscopic superposition states, e.g., the NOON states and cat states; (iii) a synthetic magnetic field created in a quasi one dimensional superradiance lattice, which is predicted to be observed in thermal vapours of alkali atoms instead of only in cold atoms (as in previous experiments). This study aims to provide a novel, highly tunable platform simulating exotic phenomena in condensed matter physics and offers a basis of topological quantum optics and novel photonic devices. Advisors/Committee Members: Scully, Marlan O (advisor), Fry, Edward S (committee member), Hemmer, Philip R (committee member), Sokolov, Alexei V (committee member), Suhail Zubairy, Muhammad (committee member).

Subjects/Keywords: superradiance; superradiance lattice; topological phase; Haldane model; spin-orbit coupling

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APA (6^th Edition):

Cai, H. (2017). Superradiance and Topological Quantum Optics in Atomic Medium and Cavity QED. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173128

Chicago Manual of Style (16^th Edition):

Cai, Han. “Superradiance and Topological Quantum Optics in Atomic Medium and Cavity QED.” 2017. Doctoral Dissertation, Texas A&M University. Accessed January 23, 2021. http://hdl.handle.net/1969.1/173128.

MLA Handbook (7^th Edition):

Cai, Han. “Superradiance and Topological Quantum Optics in Atomic Medium and Cavity QED.” 2017. Web. 23 Jan 2021.

Vancouver:

Cai H. Superradiance and Topological Quantum Optics in Atomic Medium and Cavity QED. [Internet] [Doctoral dissertation]. Texas A&M University; 2017. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1969.1/173128.

Council of Science Editors:

Cai H. Superradiance and Topological Quantum Optics in Atomic Medium and Cavity QED. [Doctoral Dissertation]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/173128

Texas A&M University

19. Liu, Xin. Spin Dynamics in the Presence of Spin-orbit Interactions: from the Weak to the Strong Spin-orbit Coupling Regime.

Degree: PhD, Physics, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11703

► We study the spin dynamics in a high-mobility two dimensional electron gas (2DEG) system with generic spin-orbit interactions (SOIs). We derive a set of spin… (more)

▼ We study the spin dynamics in a high-mobility two dimensional electron gas (2DEG) system with generic spin-orbit interactions (SOIs). We derive a set of spin dynamic equations which capture the purely exponential to the damped oscillatory spin evolution modes observed in different regimes of SOI strength. Hence we provide a full treatment of the D'yakonov-Perel's mechanism by using the microscopic linear response theory from the weak to the strong SOI limit. We show that the damped oscillatory modes appear when the electron scattering time is larger than half of the spin precession time due to the SOI, in agreement with recent observations. We propose a new way to measure the scattering time and the relative strength of Rashba and linear Dresselhaus SOIs based on these modes and optical grating experiments. We discuss the physical interpretation of each of these modes in the context of Rabi oscillation. In the finite temperature, We study the spin dynamics in the presence of impurity and electron-electron (e-e) scattering in a III-V semiconductor quantum well. Starting from the Keldysh formalism, we develop the spin-charge dynamic equation at finite temperature in the presence of inelastic scattering which provide a new approach to describe the spin relaxation from the weak to the strong spin-orbit coupling (SOC) regime. In the weak SOC regime, our theory shows that when the system is near the SU(2) symmetry point, because the spin relaxation due to DP mechanism is suppressed dramatically, the spin relaxation is dominated by the Elliott-Yafet (EY) mechanism in a wide temperature regime. The non-monotonic temperature dependence of enhanced-lifetime of spin helix mode is due to the competition between the DP and EY mechanisms. In the strong SOC regime, the our theory is consistent to the previous theoretical results at zero temperature. Advisors/Committee Members: Sinova, Jairo (advisor), Abanov, Artem (committee member), Belyanin, Alexey (committee member), Teizer, Winfried (committee member), Eknoyan, Ohannes (committee member).

Subjects/Keywords: strong Spin-orbit coupling; Dyaknov-Perel; Elliott-Yafet

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APA (6^th Edition):

Liu, X. (2012). Spin Dynamics in the Presence of Spin-orbit Interactions: from the Weak to the Strong Spin-orbit Coupling Regime. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11703

Chicago Manual of Style (16^th Edition):

Liu, Xin. “Spin Dynamics in the Presence of Spin-orbit Interactions: from the Weak to the Strong Spin-orbit Coupling Regime.” 2012. Doctoral Dissertation, Texas A&M University. Accessed January 23, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11703.

MLA Handbook (7^th Edition):

Liu, Xin. “Spin Dynamics in the Presence of Spin-orbit Interactions: from the Weak to the Strong Spin-orbit Coupling Regime.” 2012. Web. 23 Jan 2021.

Vancouver:

Liu X. Spin Dynamics in the Presence of Spin-orbit Interactions: from the Weak to the Strong Spin-orbit Coupling Regime. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11703.

Council of Science Editors:

Liu X. Spin Dynamics in the Presence of Spin-orbit Interactions: from the Weak to the Strong Spin-orbit Coupling Regime. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11703

University of California – Berkeley

20. Yi, Di. Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures.

Degree: Materials Science & Engineering, 2015, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/0w1689t5

► Multiferroic magnetoelectric (ME) materials, which simultaneously show ferroelectricity and magnetic ordering, have attracted a huge scientiﬁc attention due to both the intriguing fundamental importance and… (more)

▼ Multiferroic magnetoelectric (ME) materials, which simultaneously show ferroelectricity and magnetic ordering, have attracted a huge scientiﬁc attention due to both the intriguing fundamental importance and the great technological potential, as a result of the coupling between the dual ferroic orderings. However there are only a few single-phase multiferroic materials in nature and the performance is limited by the low ordering temperature, the small polarization/magnetization or the weak coupling eﬃciency. Another promising pathway to engineer ME coupling is through designing heterostructures. The current studies of ME coupling (electric ﬁeld control of magnetism) in heterostructures can be divided into 3 routes: (1) Using piezoelectric eﬀects to change the strain (lattice); (2) Using ferroelectric polarization to tune the carriers (charge); (3) Using multiferroic materials to manipulate the moments by magnetic coupling (spin). Previous studies of an all-oxide model heterostructure system that consists of the ferromagnet La0.7Sr0.3MnO3 (LSMO) and the BiFeO3 (BFO) reveals an interesting charge and spin interactions at the interface. Following the same route, the ﬁrst part of the dissertation focuses on two diﬀerent pathways to improve the ME coupling in manganite/BFO model system. Chapter 3 demonstrates that the ME coupling in LSMO/BFO is dramatically diﬀerent by changing the atomic stack-ing sequence at the interface. In chapter 4, another model system La0.5Ca0.5MnO3 (LCMO), which is at the ferromagnetic/antiferromagnetic phase boundary, is studied instead of LSMO to explore the limit within this route. The results complementarily suggest the importance of a more comprehensive design rule at the atomic scale in order to achieve a better ME coupling eﬃciency. Furthermore, although the coupling between the lattice, charge and spin has been intensively studied in terms of ME coupling, the orbital degree of freedom has been neglected so far. In principle, orbital is strongly coupled to lattice. Therefore a large ME coupling could be expected if a strong spin-orbit interaction could be established. The second part of the dissertation concentrates on pursuing this new ideal through two diﬀerent pathways. Chapter 5 presents a systematic study of the in-situ strain eﬀect on the magnetic and orbital orderings of a model system Nd0.5Sr0.5MnO3. The results demonstrate the close correlation between the orbital ordering parameter and the strain. However the magnetic ordering parameter is less sensitive to strain in this system. With the implication from chapter 5, 5d transition metal oxide SrIrO3(SIO), which hosts a strong intrinsic spin-orbit coupling due to the large atomic number, is studied in chapter 6. Superlattice LSMO/SIO shows an interesting novel magnetic state with a large orbital momentum in the nominally paramagnetic SIO, which is likely to be a very promising candidate to engineer the ME coupling at the interface. In summary, our studies on engineering the ME eﬀects in heterostructures have revealed two key…

Subjects/Keywords: Materials Science; Complex Oxides; Interface; Magnetism; Magnetoelectric; Multiferroic; Spin-orbit coupling

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APA (6^th Edition):

Yi, D. (2015). Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/0w1689t5

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yi, Di. “Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures.” 2015. Thesis, University of California – Berkeley. Accessed January 23, 2021. http://www.escholarship.org/uc/item/0w1689t5.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yi, Di. “Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures.” 2015. Web. 23 Jan 2021.

Vancouver:

Yi D. Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures. [Internet] [Thesis]. University of California – Berkeley; 2015. [cited 2021 Jan 23]. Available from: http://www.escholarship.org/uc/item/0w1689t5.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yi D. Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures. [Thesis]. University of California – Berkeley; 2015. Available from: http://www.escholarship.org/uc/item/0w1689t5

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Boston College

21. Dally, Rebecca Lynn. The implications of geometric frustration and orbital degeneracies on the evolution of magnetism in Na4Ir3O8 and α-NaMnO2.

Degree: PhD, Physics, 2018, Boston College

URL: http://dlib.bc.edu/islandora/object/bc-ir:108108

► Spin-orbit intertwined order gives rise to many novel phenomena with a broad phase space spanned by the competing energy scales within a system. This dissertation… (more)

Subjects/Keywords: antiferromagnets; condensed matter physics; geometric frustration; neutron scattering; spin-orbit coupling

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APA (6^th Edition):

Dally, R. L. (2018). The implications of geometric frustration and orbital degeneracies on the evolution of magnetism in Na4Ir3O8 and α-NaMnO2. (Doctoral Dissertation). Boston College. Retrieved from http://dlib.bc.edu/islandora/object/bc-ir:108108

Chicago Manual of Style (16^th Edition):

Dally, Rebecca Lynn. “The implications of geometric frustration and orbital degeneracies on the evolution of magnetism in Na4Ir3O8 and α-NaMnO2.” 2018. Doctoral Dissertation, Boston College. Accessed January 23, 2021. http://dlib.bc.edu/islandora/object/bc-ir:108108.

MLA Handbook (7^th Edition):

Dally, Rebecca Lynn. “The implications of geometric frustration and orbital degeneracies on the evolution of magnetism in Na4Ir3O8 and α-NaMnO2.” 2018. Web. 23 Jan 2021.

Vancouver:

Dally RL. The implications of geometric frustration and orbital degeneracies on the evolution of magnetism in Na4Ir3O8 and α-NaMnO2. [Internet] [Doctoral dissertation]. Boston College; 2018. [cited 2021 Jan 23]. Available from: http://dlib.bc.edu/islandora/object/bc-ir:108108.

Council of Science Editors:

Dally RL. The implications of geometric frustration and orbital degeneracies on the evolution of magnetism in Na4Ir3O8 and α-NaMnO2. [Doctoral Dissertation]. Boston College; 2018. Available from: http://dlib.bc.edu/islandora/object/bc-ir:108108

Rice University

22. Zhu, Chuanzhou. Novel Spin-orbit Coupling in Cold Atoms.

Degree: PhD, Natural Sciences, 2020, Rice University

URL: http://hdl.handle.net/1911/107990

► In cold atom, the coupling between "spin" (atomic internal hyperfine states) and "orbit" (atomic center-of-mass motion) can be induced by Raman transition, where different hyperfine… (more)

Subjects/Keywords: theoretical physics; cold atom physics; quantum optics; synthetic spin-orbit coupling

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APA (6^th Edition):

Zhu, C. (2020). Novel Spin-orbit Coupling in Cold Atoms. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/107990

Chicago Manual of Style (16^th Edition):

Zhu, Chuanzhou. “Novel Spin-orbit Coupling in Cold Atoms.” 2020. Doctoral Dissertation, Rice University. Accessed January 23, 2021. http://hdl.handle.net/1911/107990.

MLA Handbook (7^th Edition):

Zhu, Chuanzhou. “Novel Spin-orbit Coupling in Cold Atoms.” 2020. Web. 23 Jan 2021.

Vancouver:

Zhu C. Novel Spin-orbit Coupling in Cold Atoms. [Internet] [Doctoral dissertation]. Rice University; 2020. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1911/107990.

Council of Science Editors:

Zhu C. Novel Spin-orbit Coupling in Cold Atoms. [Doctoral Dissertation]. Rice University; 2020. Available from: http://hdl.handle.net/1911/107990

Victoria University of Wellington

23. Gühne, Robin. Electronic properties of the topological insulators Bi₂Se₃ and Bi₂Te₃.

Degree: 2020, Victoria University of Wellington

URL: http://hdl.handle.net/10063/8643

► The three-dimensional topological insulators Bi₂Se₃ and Bi₂Te₃ are model systems of a new class of materials with an insulating bulk and gapless surface states. Their… (more)

Subjects/Keywords: Topological insulator; Magnetoresistance; Band inversion; Spin-orbit coupling; Defects

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APA (6^th Edition):

Gühne, R. (2020). Electronic properties of the topological insulators Bi₂Se₃ and Bi₂Te₃. (Doctoral Dissertation). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/8643

Chicago Manual of Style (16^th Edition):

Gühne, Robin. “Electronic properties of the topological insulators Bi₂Se₃ and Bi₂Te₃.” 2020. Doctoral Dissertation, Victoria University of Wellington. Accessed January 23, 2021. http://hdl.handle.net/10063/8643.

MLA Handbook (7^th Edition):

Gühne, Robin. “Electronic properties of the topological insulators Bi₂Se₃ and Bi₂Te₃.” 2020. Web. 23 Jan 2021.

Vancouver:

Gühne R. Electronic properties of the topological insulators Bi₂Se₃ and Bi₂Te₃. [Internet] [Doctoral dissertation]. Victoria University of Wellington; 2020. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10063/8643.

Council of Science Editors:

Gühne R. Electronic properties of the topological insulators Bi₂Se₃ and Bi₂Te₃. [Doctoral Dissertation]. Victoria University of Wellington; 2020. Available from: http://hdl.handle.net/10063/8643

University of Toronto

24. Venkataraman, Vijay Shankar. Perspectives from Ab-initio and Tight-binding: Applications to Transition Metal Compounds and Superlattices.

Degree: PhD, 2016, University of Toronto

URL: http://hdl.handle.net/1807/73205

► The experimental and theoretical study of transition metal compounds have occupied condensed matter physicists for the best part of the last century. The rich variety… (more)

▼ The experimental and theoretical study of transition metal compounds have occupied condensed matter physicists for the best part of the last century. The rich variety of physical behaviour exhibited by these compounds owes its origin to the subtle balance of the energy scales at play for the d orbitals. In this thesis, we study three different systems comprised of transition metal atoms from the third, the fourth, and the fifth group of the periodic table using a combination of \emph{ab-initio} density functional theory (DFT) computations and effective tight-binding models for the electronic properties. We first consider the electronic properties of artificially fabricated perovskite superlattices of the form [(\ce{SrIrO3})_m / \ce{SrTiO3}] with integer m denoting the number of layers of \ce{SrIrO3}. After discussing the results of experiments undertaken by our collaborators, we present the results of our DFT calculations and build tight-binding models for the m=1 and m=2 superlattices. The active ingredient is found to be the \ce{Ir} 5d orbitals with significant spin-orbit coupling. We then study the energies of magnetic ground states within DFT and compare and contrast our results with those obtained for the bulk Ruddlesden-Popper iridates. Together with experimental measurements, our results suggest that these superlattices are an exciting venue to probe the magnetism and metal-insulator transitions that occur from the intricate balance of the spin-orbit coupling and electron interactions, as has been reported for their bulk counterparts. Next, we consider α-\ce{RuCl3}, a honeycomb lattice compound. We first show using DFT calculations in conjunction with experiments performed by our collaborators, how spin-orbit coupling in the 4d orbitals of \ce{Ru} is essential to understand the insulating state realized in this compound. Then, in the latter half of the chapter, we study the magnetic ground states of a two-dimensional analogue of α-\ce{RuCl3} in weak and strong-coupling regimes obtained from a tight-binding model for the 4d orbitals. We further compare these results with energies obtained from DFT calculations. We obtain a zig-zag magnetic ground state for this compound, in all the three approaches. Within DFT, we find that correlations enhance the spin-orbit coupling in this compound and that the anisotropic Kitaev interactions between the spins are dominant in a strong-coupling model. Then, we move on to study the electronic band structures of the higher manganese silicides, which are good thermoelectric materials. Using results from DFT calculations on \ce{Mn4Si7} and structural arguments, we construct an effective tight-binding model for the first three members of this series - \ce{Mn4Si7}, \ce{Mn11Si19}, and \ce{Mn15Si26}. Advisors/Committee Members: Kee, Hae-Young, Physics.

Subjects/Keywords: density functional theory; magnetism; spin-orbit coupling; strongly correlated systems; 0611

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APA (6^th Edition):

Venkataraman, V. S. (2016). Perspectives from Ab-initio and Tight-binding: Applications to Transition Metal Compounds and Superlattices. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/73205

Chicago Manual of Style (16^th Edition):

Venkataraman, Vijay Shankar. “Perspectives from Ab-initio and Tight-binding: Applications to Transition Metal Compounds and Superlattices.” 2016. Doctoral Dissertation, University of Toronto. Accessed January 23, 2021. http://hdl.handle.net/1807/73205.

MLA Handbook (7^th Edition):

Venkataraman, Vijay Shankar. “Perspectives from Ab-initio and Tight-binding: Applications to Transition Metal Compounds and Superlattices.” 2016. Web. 23 Jan 2021.

Vancouver:

Venkataraman VS. Perspectives from Ab-initio and Tight-binding: Applications to Transition Metal Compounds and Superlattices. [Internet] [Doctoral dissertation]. University of Toronto; 2016. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1807/73205.

Council of Science Editors:

Venkataraman VS. Perspectives from Ab-initio and Tight-binding: Applications to Transition Metal Compounds and Superlattices. [Doctoral Dissertation]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/73205

Georgia Tech

25. Han, Li. Spin-orbit coupled ultracold fermions.

Degree: PhD, Physics, 2014, Georgia Tech

URL: http://hdl.handle.net/1853/52314

► In this Thesis we discussed ultracold Fermi gas with an s-wave interaction and synthetic spin-orbit coupling under a variety of conditions. We considered the system… (more)

Subjects/Keywords: Ultracold atoms; Degenerate Fermi gas; Spin-orbit coupling

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APA (6^th Edition):

Han, L. (2014). Spin-orbit coupled ultracold fermions. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/52314

Chicago Manual of Style (16^th Edition):

Han, Li. “Spin-orbit coupled ultracold fermions.” 2014. Doctoral Dissertation, Georgia Tech. Accessed January 23, 2021. http://hdl.handle.net/1853/52314.

MLA Handbook (7^th Edition):

Han, Li. “Spin-orbit coupled ultracold fermions.” 2014. Web. 23 Jan 2021.

Vancouver:

Han L. Spin-orbit coupled ultracold fermions. [Internet] [Doctoral dissertation]. Georgia Tech; 2014. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1853/52314.

Council of Science Editors:

Han L. Spin-orbit coupled ultracold fermions. [Doctoral Dissertation]. Georgia Tech; 2014. Available from: http://hdl.handle.net/1853/52314

26. Radic, Juraj. Spin-Orbit-Coupled Quantum Gases.

Degree: Physics, 2015, University of Maryland

URL: http://hdl.handle.net/1903/17260

► The dissertation explores the effects of synthetic spin-orbit coupling on the behaviour of quantum gases in several different contexts. We first study realistic methods to… (more)

▼ The dissertation explores the effects of synthetic spin-orbit coupling on the behaviour of quantum gases in several different contexts. We first study realistic methods to create vortices in spin-orbit-coupled (SOC) Bose-Einstein condensates (BEC). We propose two different methods to induce thermodynamically stable static vortex configurations: (1) to rotate both the Raman lasers and the anisotropic trap; and (2) to impose a synthetic Abelian field on top of synthetic spin-orbit interactions. We solve the Gross-Pitaevskii equation for several experimentally relevant regimes and find new interesting effects such as spatial separation of left- and right-moving spin-orbit-coupled condensates, and the appearance of unusual vortex arrangements. Next we consider cold atoms in an optical lattice with synthetic SOC in the Mott-insulator regime. We calculate the parameters of the corresponding tight-binding model and derive the low-energy spin Hamiltonian which is a combination of Heisenberg model, quantum compass model and Dzyaloshinskii-Moriya interaction. We find that the Hamiltonian supports a rich classical phase diagram with collinear, spiral and vortex phases. Next we study the time evolution of the magnetization in a Rashba spin-orbit-coupled Fermi gas, starting from a fully-polarized initial state. We model the dynamics using a Boltzmann equation, which we solve in the Hartree-Fock approximation. The resulting non-linear system of equations gives rise to three distinct dynamical regimes controlled by the ratio of interaction and spin-orbit-coupling strength λ: for small λ, the magnetization decays to zero. For intermediate λ, it displays undamped oscillations about zero and for large λ, a partially magnetized state is dynamically stabilized. Motivated by an interesting stripe phase which appears in BEC with SOC [Li et al., Phys. Rev. Lett. 108, 225301 (2011)], we study the finite-temperature phase diagram of a pseudospin-1/2 Bose gas with contact interactions. We show that strong inter-spin interactions can lead to the appearance of magnetically ordered phases at temperatures above the superfluid transition. For the case of inter-spin attraction, we also discuss the possibility of a bosonic analogue of the Cooper-paired phase, however this state is not energetically favourable. We extend our calculations to a spin-orbit-coupled Bose gas to investigate the possibility of stripe ordering in the normal phase. However, within our approximations, we do not find an instability towards stripe formation. Finally, we consider a two-dimensional Bose gas at zero temperature with an underlying quartic single-particle dispersion in one spatial direction. This Hamiltonian can be realized using the NIST scheme of spin-orbit coupling [Y.-J. Lin, K. Jimenez-Garcia, and I. B. Spielman, Nature 471, 83 (2011)], or using the shaken lattice scheme of Parker et al. [C. V. Parker, L.-C. Ha and C. Chin, Nature Physics 9, 769 (2013)]. By numerically comparing energies of various trial wave-functions, we show that, at low densities, the… Advisors/Committee Members: Galitski, Victor (advisor).

Subjects/Keywords: Physics; Cold atoms; Quantum gases; Spin-orbit coupling

11 more images…

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APA (6^th Edition):

Radic, J. (2015). Spin-Orbit-Coupled Quantum Gases. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/17260

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Radic, Juraj. “Spin-Orbit-Coupled Quantum Gases.” 2015. Thesis, University of Maryland. Accessed January 23, 2021. http://hdl.handle.net/1903/17260.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Radic, Juraj. “Spin-Orbit-Coupled Quantum Gases.” 2015. Web. 23 Jan 2021.

Vancouver:

Radic J. Spin-Orbit-Coupled Quantum Gases. [Internet] [Thesis]. University of Maryland; 2015. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1903/17260.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Radic J. Spin-Orbit-Coupled Quantum Gases. [Thesis]. University of Maryland; 2015. Available from: http://hdl.handle.net/1903/17260

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

27. Rudolph, Martin. Quantum transport in mesoscopic systems of Bi and other strongly spin-orbit coupled materials.

Degree: PhD, Physics, 2013, Virginia Tech

URL: http://hdl.handle.net/10919/20374

► Systems with strong spin-orbit coupling are of particular interest in solid state physics as an avenue for observing and manipulating spin physics using standard electrical… (more)

Subjects/Keywords: spin-orbit coupling; quantum coherence; bismuth; InSb; weak antilocalization

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APA (6^th Edition):

Rudolph, M. (2013). Quantum transport in mesoscopic systems of Bi and other strongly spin-orbit coupled materials. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/20374

Chicago Manual of Style (16^th Edition):

Rudolph, Martin. “Quantum transport in mesoscopic systems of Bi and other strongly spin-orbit coupled materials.” 2013. Doctoral Dissertation, Virginia Tech. Accessed January 23, 2021. http://hdl.handle.net/10919/20374.

MLA Handbook (7^th Edition):

Rudolph, Martin. “Quantum transport in mesoscopic systems of Bi and other strongly spin-orbit coupled materials.” 2013. Web. 23 Jan 2021.

Vancouver:

Rudolph M. Quantum transport in mesoscopic systems of Bi and other strongly spin-orbit coupled materials. [Internet] [Doctoral dissertation]. Virginia Tech; 2013. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10919/20374.

Council of Science Editors:

Rudolph M. Quantum transport in mesoscopic systems of Bi and other strongly spin-orbit coupled materials. [Doctoral Dissertation]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/20374

University of New South Wales

28. Liu, Hong. Two Dimensional Quantum Transport with Spin-orbit coupling and many-body interactions.

Degree: Physics, 2019, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/65285 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63968/SOURCE02?view=true

► I theoretically studied the transport properties in 2D materials using quantum kinetic theory, especially in semiconductors and topological insulators. Firstly, I calculated the Coulomb drag… (more)

▼ I theoretically studied the transport properties in 2D materials using quantum kinetic theory, especially in semiconductors and topological insulators. Firstly, I calculated the Coulomb drag in a magnetic doped 3D topological insulator. Coulomb drag is caused by the transfer of momentum between electrons in different layers due to the interlayer electron-electron scattering. I determined the role played by the anomalous Hall effect in Coulomb drag in doped massive Dirac fermion systems. The transverse response of the active layer is dominated by a topological term arising from the Berry curvature and the topological mechanism does not contribute to Coulomb drag, yet the longitudinal drag force in the passive layer gives rise to a transverse drag current. This anomalous Hall drag current is independent of the active-layer magnetization, a fact that can be verified experimentally. It depends non-monotonically on the passive-layer magnetization, exhibiting a peak that becomes more pronounced at low densities. Then I calculated the Rashba spin-orbit coupling correction to Hall coefficient in 2D hole systems up to the second order. In this work, I demonstrated that quantum spin dynamics induced by the spin-orbit interaction are directly observable in the classical charge transport. I determined the Hall coefficient RH in 2D hole systems at a low magnetic field and showed that it has a sizable spin-orbit contribution, which depends on the density ñ, is independent of temperature, is a strong function of the top gate electric field, and can reach 30% of the total. This work provides a general method for extracting the spin-orbit parameter from magnetotransport data, applicable even at higher temperatures where Shubnikov-de Haas oscillations and weak antilocalization are difficult to observe. Furthermore, using the analytical calculation and the classical Monte-Carlo simulation, I study the phase diagram of an interacting 2D electron gas with Rashba and Dresselhaus spin-orbit coupling. I found the out-of-plane spin-polarization phase is shrinking when Dresselhaus spin-orbit interaction is stronger and stronger. By mapping the interacting 2D electron gas with equal Rashba and Dresselhaus spin-orbit coupling system onto the 2D electron gas system, we found out-of-plane spin-polarization phase disappears and only in-plane spin polarization phase exists when rS>2.01. The possibilities of the experimental finding of the novel phases are also discussed here. Advisors/Committee Members: Culcer, Dimitrie, Physics, Faculty of Science, UNSW.

Subjects/Keywords: Many-body interactions; Quantum transport; Spin-orbit coupling

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APA (6^th Edition):

Liu, H. (2019). Two Dimensional Quantum Transport with Spin-orbit coupling and many-body interactions. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/65285 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63968/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Liu, Hong. “Two Dimensional Quantum Transport with Spin-orbit coupling and many-body interactions.” 2019. Doctoral Dissertation, University of New South Wales. Accessed January 23, 2021. http://handle.unsw.edu.au/1959.4/65285 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63968/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Liu, Hong. “Two Dimensional Quantum Transport with Spin-orbit coupling and many-body interactions.” 2019. Web. 23 Jan 2021.

Vancouver:

Liu H. Two Dimensional Quantum Transport with Spin-orbit coupling and many-body interactions. [Internet] [Doctoral dissertation]. University of New South Wales; 2019. [cited 2021 Jan 23]. Available from: http://handle.unsw.edu.au/1959.4/65285 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63968/SOURCE02?view=true.

Council of Science Editors:

Liu H. Two Dimensional Quantum Transport with Spin-orbit coupling and many-body interactions. [Doctoral Dissertation]. University of New South Wales; 2019. Available from: http://handle.unsw.edu.au/1959.4/65285 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63968/SOURCE02?view=true

University of St. Andrews

29. Markovic, Igor. Interplay of spin-orbit coupling and crystal symmetries in the electronic structures of NbGeSb and Ca₃Ru₂O₇ .

Degree: 2020, University of St. Andrews

URL: http://hdl.handle.net/10023/20531

► This thesis presents the study of electronic structure of two materials with strong spin-orbit coupling using angle-resolved photoemission spectroscopy (ARPES) experiments and density-functional theory (DFT)… (more)

▼ This thesis presents the study of electronic structure of two materials with strong spin-orbit coupling using angle-resolved photoemission spectroscopy (ARPES) experiments and density-functional theory (DFT) band calculations. The two materials are NbGeSb and Ca₃Ru₂O₇, which host weak and strong electronic interactions, respectively. While at first glance they seem rather disparate, I will show in both cases how novel phenomena emerge from the interplay of spin-orbit coupling and the crystal symmetries. In NbGeSb, I combine insights from spin-integrated and spin-resolved ARPES measurements with DFT slab calculations to reveal how band inversion of two pairs of spin-orbit coupled surface states along the edge of the Brillouin zone results in a peculiar crossing structure with two protected and two asymmetrically gapped crossing points. I show how this is caused by the presence of a mirror symmetry line assigning definite mirror parity to orbital and spin angular momentum of the bands. This leads to a low-energy description of the crossing points equivalent to a two-dimensional Weyl equation, establishing them as 2D analogues of Weyl points. In Ca₃Ru₂O₇, on the other hand, spin-orbit coupling provides a link between the electronic structure, the underlying antiferromagnetic order and the inherent antipolar distortion in the crystal structure. Our results reveal that a known structural and spin reorientation transition is caused by a spin-orbit derived gapping of a large Fermi surface. The hybridisation term couples the magnetic moment direction with the antipolar distortion of the crystal structure, and is only unlocked when the resulting electronic energy gain becomes enough to overcome the cost of spin reorientations. These findings together highlight the abundance of possibilities for novel phenomena arising from the interplay of spin-orbit coupling and crystal symmetries in quantum materials. Advisors/Committee Members: King, Phil (advisor), Mackenzie, Andrew (advisor).

Subjects/Keywords: Photoemission spectroscopy; Electronic structure; Crystal symmetries; Spin-orbit coupling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Markovic, I. (2020). Interplay of spin-orbit coupling and crystal symmetries in the electronic structures of NbGeSb and Ca₃Ru₂O₇ . (Thesis). University of St. Andrews. Retrieved from http://hdl.handle.net/10023/20531

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Markovic, Igor. “Interplay of spin-orbit coupling and crystal symmetries in the electronic structures of NbGeSb and Ca₃Ru₂O₇ .” 2020. Thesis, University of St. Andrews. Accessed January 23, 2021. http://hdl.handle.net/10023/20531.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Markovic, Igor. “Interplay of spin-orbit coupling and crystal symmetries in the electronic structures of NbGeSb and Ca₃Ru₂O₇ .” 2020. Web. 23 Jan 2021.

Vancouver:

Markovic I. Interplay of spin-orbit coupling and crystal symmetries in the electronic structures of NbGeSb and Ca₃Ru₂O₇ . [Internet] [Thesis]. University of St. Andrews; 2020. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10023/20531.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Markovic I. Interplay of spin-orbit coupling and crystal symmetries in the electronic structures of NbGeSb and Ca₃Ru₂O₇ . [Thesis]. University of St. Andrews; 2020. Available from: http://hdl.handle.net/10023/20531

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Colorado

30. Bromley, Sarah Louise. Many-Body Physics in an Optical Lattice Clock.

Degree: PhD, 2018, University of Colorado

URL: https://scholar.colorado.edu/phys_gradetds/240

► In this work we study the effect of interactions in an optical lattice clock based on fermionic Sr atoms. In current one-dimensional lattice clocks… (more)

Subjects/Keywords: atomic clocks; collective; spin-orbit coupling; strontium; spin-polarized; Atomic, Molecular and Optical Physics; Physics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bromley, S. L. (2018). Many-Body Physics in an Optical Lattice Clock. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/phys_gradetds/240

Chicago Manual of Style (16^th Edition):

Bromley, Sarah Louise. “Many-Body Physics in an Optical Lattice Clock.” 2018. Doctoral Dissertation, University of Colorado. Accessed January 23, 2021. https://scholar.colorado.edu/phys_gradetds/240.

MLA Handbook (7^th Edition):

Bromley, Sarah Louise. “Many-Body Physics in an Optical Lattice Clock.” 2018. Web. 23 Jan 2021.

Vancouver:

Bromley SL. Many-Body Physics in an Optical Lattice Clock. [Internet] [Doctoral dissertation]. University of Colorado; 2018. [cited 2021 Jan 23]. Available from: https://scholar.colorado.edu/phys_gradetds/240.

Council of Science Editors:

Bromley SL. Many-Body Physics in an Optical Lattice Clock. [Doctoral Dissertation]. University of Colorado; 2018. Available from: https://scholar.colorado.edu/phys_gradetds/240

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Open Access Theses and Dissertations