Theory of t2g electron-gas Rashba interactions

Abstract

The spin-degeneracy of Bloch bands in a crystal can be lifted when spin-orbit (SO) coupling is present and inversion symmetry is absent. In two-dimensional electron systems (2DES) spin-degeneracy is lifted by Rashba interaction terms - symmetry invariants that are scalar products of spin and orbital axial vectors. Rashba interactions are symmetry allowed whenever a 2DES is not invariant under reflections through the plane it occupies. In this paper, we use a tight-binding model informed by ab initio electronic structure calculations to develop a theory of Rashba splitting in the t2g bands of the two- dimensional electron systems formed at cubic perovskite crystal surfaces and interfaces. We find that Rashba splitting in these systems is due to atomic-like on-site SO interactions combined with processes in which t2g electrons change orbital character when they hop between metal sites. These processes are absent in a cubic environment and are due primarily to polar lattice distortions which alter the metal-oxygen-metal bond angle.

References in corpus (2)

• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure

Cited by in corpus (99)

• Topological Mirror Superconductivity
• Ferroelectric Rashba Semiconductors as a novel class of multifunctional materials
• Maximal Rashba-like spin splitting via kinetic energy-driven inversion symmetry breaking
• Ferromagnetic exchange, spin-orbit coupling and spiral magnetism at the LaAlO_3/SrTiO_3 interface
• Quasiparticle dynamics and spin-orbital texture of the SrTiO3 two-dimensional electron gas
• Nanoscale Phenomena in Oxide Heterostructures
• Nonlinear planar Hall effect
• Possibility of Combining Ferroelectricity and Rashba-like spin splitting in Monolayers of 1T-type Transition-Metal Dichalcogenides MX2
• Control of a two-dimensional electron gas on SrTiO3(111) by atomic oxygen
• Spin and orbital Edelstein effect in an oxide two-dimensional electron gas: theory and application to AlO${}_x$/SrTiO${}_3$
• Intrinsic orbital and spin Hall effects in monolayer transition metal dichalcogenides
• Surface magnetism of strontium titanate
• Tunable superconductivity at the oxide-insulator/KTaO${}_3$ interface and its origin
• Magnetism, spin texture and in-gap states: Atomic specialization at the surface of oxygen-deficient SrTiO${}_3$
• Oxygen-Octahedral-Tilting-Driven Topological Hall Effect in Ultrathin SrRuO3 Films
• Giant tunability of the two-dimensional electron gas at the interface of gamma-Al2O3/SrTiO3
• Interface-induced magnetism in perovskite quantum wells
• RKKY interaction in three-dimensional electron gases with linear spin-orbit coupling
• Large modulation of the Shubnikov-de Haas oscillations by the Rashba interaction at the LaAlO${}_3$/SrTiO${}_3$ interface
• Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO${}_3$ interfaces
• Possible signatures of mixed-parity superconductivity in doped polar SrTiO3 films
• Spin-orbit-coupled ferroelectric superconductivity
• Competition Between Kondo Screening and Magnetism at the LaAlO${}_3$/SrTiO${}_3$ Interface
• Spin responses and effective Hamiltonian for the two dimensional electron gas at oxide interface {LaAlO}${}_3$/{SrTiO}${}_3$
• Phase diagrams of voltage-gated oxide interfaces with strong Rashba coupling
• Anisotropic superconductivity mediated by ferroelectric fluctuations in cubic systems with spin-orbit coupling
• Theory of the spin galvanic effect at oxide interfaces
• Topological states at the (001) surface of SrTiO3
• Electron correlation and magnetism at the LaAlO${}_3$/SrTiO${}_3$ interface: A DFT+DMFT investigation
• Quantum confinement in perovskite oxide heterostructures: tight binding instead of nearly free electron picture
• Inter-orbital topological superconductivity in spin-orbit coupled superconductors with inversion symmetry breaking
• Absence of Giant Spin Splitting in the Two-Dimensional Electron Liquid at the Surface of SrTiO${}_3$ (001)
• Giant switchable Rashba effect in oxide heterostructures
• Coupling charge and topological reconstructions at polar oxide interfaces
• Magneto-transport study of top- and back-gated LaAlO${}_3$/SrTiO${}_3$ heterostructures
• Band inversion driven by electronic correlations at the (111) LaAlO${}_3$/SrTiO${}_3$ interface
• k.p subband structure of the LaAlO3/SrTiO3 interface
• Theory of a chiral Fermi liquid: general formalism
• Evolution of topological superconductivity by orbital selective confinement in oxide nanowires
• Theory of superconductivity mediated by Rashba coupling in incipient ferroelectrics
• Spin-texture induced by oxygen vacancies in Strontium perovskites (001) surfaces: A theoretical comparison between SrTiO3 and SrHfO3
• Tuning Rashba spin-orbit coupling at LaAlO3/SrTiO3 interfaces by band filling
• Weak Localization, Spin Relaxation, and Spin-Diffusion: The Crossover Between Weak and Strong Rashba Coupling Limits
• Multi-band theory of superconductivity at the LaAlO${}_3$/SrTiO${}_3$ interface
• 2D surprises at the surface of 3D materials: confined electron systems in transition metal oxides
• Generalized Rashba Electron-Phonon Coupling and Superconductivity in Strontium Titanate
• Interfacial Rashba magnetoresistance of two-dimensional electron gas at LaAlO${}_3$/SrTiO${}_3$ interface
• Semiclassical theory of anisotropic transport at LaAlO3/SrTiO3 interfaces under in-plane magnetic field
• Strongly enhanced Rashba splittings in oxide heterostructure: a tantalite monolayer on BaHfO${}_3$
• Intrinsic spin Hall effect in systems with striped spin-orbit coupling
• Signature of enhanced spin-orbit interaction in the magnetoresistance of LaTiO${}_3$/SrTiO${}_3$ interfaces on $\delta$-doping
• The mechanism of spin-orbit coupling in a 2D oxide interface
• Anomalous Josephson Coupling and High-Harmonics in Non-Centrosymmetric Superconductors with $S$-wave Spin-Triplet Pairing
• Orbital tunable 0-$\pi$ transitions in Josephson junctions with noncentrosymmetric topological superconductors
• Superconducting dome in the LaAlO${}_3$/SrTiO${}_3$ interfaces as a direct effect of the extended s-wave symmetry of the gap
• Theoretical models of Rashba spin splitting in asymmetric SrTiO3-based heterostructures
• A Striped Electron Fluid on (111) KTaO${}_3$
• Experimental Evidence of t2g Electron-Gas Rashba Interaction Induced by Asymmetric Orbital Hybridization
• Tunable Rashba spin-orbit coupling and its interplay with multiorbital effect and magnetic ordering at oxide interfaces
• Plasmons at the LaAlO${}_3$/SrTiO${}_3$ interface and Graphene-LaAlO${}_3$/SrTiO${}_3$ double layer
• Tunable spin and orbital polarization in SrTiO3-based heterostructures
• Influence of the ferroelectric quantum critical point on SrTiO${}_3$ interfaces
• Spin-Orbital Hallmarks of Unconventional Superconductors Without Inversion Symmetry
• Quasiparticle Mass Enhancement and Fermi Surface Shape Modification in Oxide Two-Dimensional Electron Gases
• Interplay between singlet and triplet pairings in multi-band two-dimensional oxide superconductors
• Spin to charge conversion at Rashba-split SrTiO${}_3$ interfaces from resonant tunneling
• Magnetic and transport signatures of Rashba spin-orbit coupling on the ferromagnetic Kondo lattice model in two dimensions
• Helical Majorana fermions at the interface of Weyl semimetal and d-wave superconductor: Application to Iridates and high-Tc Cuprates
• Anomalous transport near the Lifshitz transition at the LaAlO${}_3$/SrTiO${}_3$ interface
• Ballistic transport through quantum point contacts of multi-orbital oxides
• Spin-orbital polarization of Majorana edge states in oxides nanowires
• High orbital-moment Cooper pairs by crystalline symmetry breaking
• Observation of transient superconductivity at the LaAlO${}_3$/SrTiO${}_3$ interface
• Signatures of Electronic Nematicity in (111) LaAlO${}_3$/SrTiO${}_3$ Interfaces
• Possible Flexoelectric Origin of the Lifshitz Transition in LaAlO${}_3$/SrTiO${}_3$ Interfaces
• La interstitial defect-induced insulator-metal transition in oxide heterostructures LaAlO3/SrTiO3
• Helical currents in metallic Rashba strips
• Current-induced spin polarization in isotropic k-cubed Rashba model: Theoretical study for p-doped semiconductor heterostructures and perovskite oxides interfaces
• Structure and ferromagnetic instability of the oxygen-deficient SrTiO${}_3$ surface
• Anisotropic Rashba coupling to polar modes in KTaO3
• Spin texture driven spintronic enhancement at the LaAlO${}_3$/SrTiO${}_3$ interface
• Electric dipole spin resonance in single and two electron quantum dot defined in two-dimensional electron gas at the SrTiO${}_3$/LaAlO${}_3$ interface
• Spin and orbital Edelstein effect in spin-orbit coupled noncentrosymmetric superconductor
• Evolution of domain structure with electron doping in ferroelectric thin films
• Surface State of Inter-orbital Pairing State in Sr${}_2$RuO${}_4$ Superconductor
• Multi-orbital Fulde-Ferrell-Larkin-Ovchinnikov State in SrTiO_3 Heterostructures
• Optical conductivity of the $t_{2g}$ two-dimensional electron gas
• Optical conductivity of a 2DEG with anisotropic Rashba interaction at the interface of LaAlO${}_3$/SrTiO${}_3$
• Two-Dimensional Charge Localization at the Perovskite Oxide Interface
• Magnetotransport of a 2DEG with anisotropic Rashba interaction at the LaAlO${}_3$/SrTiO${}_3$ interface
• Evolution of the magnetoresistance lineshape with temperature and electric field across Nb-doped SrTiO${}_3$ interface
• Drift velocity of edge magnetoplasmons due to magnetic edge channels
• Evidence of linear and cubic Rashba effect in non-magnetic heterostructure
• Spin-Hall Current and Nonlocal Transport in Ferromagnet-Free Multi-band models for SrTiO3-Based Nanodevices in the presence of impurities
• Anomalous Hall and Nernst effects in a two-dimensional electron gas with an anisotropic cubic Rashba spin-orbit interaction
• Particle-hole spectral asymmetry at the edge of multiorbital noncentrosymmetric superconductors
• Magnetotransport of Functional Oxide Heterostructures Affected by Spin-Orbit Coupling: A Tale of Two-Dimensional Systems
• Bilinear magnetoresistance in 2DEG with isotropic cubic Rashba spin-orbit interaction
• Scanning gate microscopy probing of anisotropic electron flow in a two dimensional electron gas at the (110) ${\mathrm{LaAlO}}_3/{\mathrm{SrTiO}}_3$ interface: A theoretical investigation