Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces

Abstract

The theoretical understanding of the spin-orbit coupling (SOC) effects at LaAlO${}_3$/SrTiO${}_3$ interfaces and SrTiO${}_3$ surfaces is still in its infancy. We perform first-principles density-functional-theory calculations and derive from these a simple tight-binding Hamiltonian, through a Wannier function projection and group theoretical analysis. We find striking differences to the standard Rashba theory for spin-orbit coupling in semiconductor heterostructures due to multi-orbital effects: by far the biggest SOC effect is at the crossing point of the $xy$ and $yz$ (or $zx$) orbitals; and around the $\Gamma$ point a Rashba spin splitting with a cubic dependence on the wave vector $\vec{k}$ is possible.

The second version explains the k-cubic Rasha effect and the anisotropy found experimentally respectively. It also includes DFT calculations for an antisymmetric interfaces with more layers

References in corpus (7)

• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Avoiding the polarization catastrophe in LaAlO3 overlayers on SrTiO3(001) through a polar distortion
• Polarity-induced oxygen vacancies at LaAlO3|SrTiO3 interfaces
• Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure
• Intrinsic instability of electronic interfaces with strong Rashba coupling
• Magnetic and Superconducting Ordering at LaAlO3/SrTiO3 Interfaces
• Spin-Orbit Coupling in LaAlO${}_3$/SrTiO${}_3$ interfaces: Magnetism and Orbital Ordering

Cited by in corpus (70)

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• Giant negative magnetoresistance driven by spin-orbit coupling at the LAO/STO interface
• Structural Phase Transitions in SrTiO3 from Deep Potential Molecular Dynamics
• Surface magnetism of strontium titanate
• Link between the Superconducting Dome and Spin-Orbit Interaction in the (111) LaAlO${}_3$/SrTiO${}_3$ Interface
• Gate-tunable band structure of the LaAlO${}_3$-SrTiO${}_3$ interface
• Giant tunability of the two-dimensional electron gas at the interface of gamma-Al2O3/SrTiO3
• Weak-localization and spin-orbit interaction in side-gate field effect devices at the LaAlO${}_3$/SrTiO${}_3$ interface
• 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
• Anomalous orbital structure in a spinel-perovskite interface $\gamma$-Al${}_2$O${}_3$/SrTiO${}_3$
• Spin responses and effective Hamiltonian for the two dimensional electron gas at oxide interface {LaAlO}${}_3$/{SrTiO}${}_3$
• Theory of the spin galvanic effect at oxide interfaces
• Nature of Orbital and Spin Rashba Coupling in the Surface Bands of SrTiO3 and KTaO3
• Giant switchable Rashba effect in oxide heterostructures
• Magneto-transport study of top- and back-gated LaAlO${}_3$/SrTiO${}_3$ heterostructures
• Electric octupole order in bilayer Rashba system
• Electronic correlations at paramagnetic $(001)$ and $(110)$ NiO surfaces: Charge-transfer and Mott-Hubbard-type gaps at the surface and subsurface of $(110)$ NiO
• Cubic interaction parameters for t2g Wannier orbitals
• Large polarons as key quasiparticles in SrTiO3 and SrTiO3-based heterostructures
• Theory of superconductivity mediated by Rashba coupling in incipient ferroelectrics
• Theory of superconductivity in doped quantum paraelectrics
• Weak Localization, Spin Relaxation, and Spin-Diffusion: The Crossover Between Weak and Strong Rashba Coupling Limits
• Perovskite oxide heterojunction for Rashba-Dresselhaus assisted antiferromagnetic spintronics
• Two-Dimensional Large Gap Topological Insulators with Large Rashba Spin-Orbit Coupling in Group-IV films
• Inhomogeneous multi-carrier superconductivity at LaXO3/SrTiO3 (X=Al or Ti) oxide interfaces
• Electronic properties of LaAlO3/SrTiO3 n-type interfaces: A GGA+U study
• Generalized Rashba Electron-Phonon Coupling and Superconductivity in Strontium Titanate
• Interfacial Rashba magnetoresistance of two-dimensional electron gas at LaAlO${}_3$/SrTiO${}_3$ interface
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• Signature of enhanced spin-orbit interaction in the magnetoresistance of LaTiO${}_3$/SrTiO${}_3$ interfaces on $\delta$-doping
• Probing Topological Superconductivity of oxide nanojunctions using fractional Shapiro steps
• Experimental Evidence of t2g Electron-Gas Rashba Interaction Induced by Asymmetric Orbital Hybridization
• Influence of the ferroelectric quantum critical point on SrTiO${}_3$ interfaces
• Tunable spin and orbital polarization in SrTiO3-based heterostructures
• 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
• Engineered Kondo screening and nonzero Berry phase in SrTiO3/LaTiO3/SrTiO3 heterostructures
• Temperature-Dependent Band Structure of SrTiO${}_3$ Interfaces
• Rashba-like spin-orbit interaction and spin texture at the KTaO${}_{\text{3}}$ (001) surface from DFT calculations
• Anomalous transport near the Lifshitz transition at the LaAlO${}_3$/SrTiO${}_3$ interface
• Electron Correlation Effects in Non-Centrosymmetric Metals in the Weak Coupling Regime
• $d_{xz/yz}$ Orbital Subband Structures and Chiral Orbital Angular Momentum in the (001) Surface States of SrTiO${}_3$
• Magnetotransport properties of two-dimensional fermions with $k$-cubic Rashba spin-orbit interaction
• Electronic Structure and Magnetism of the Triple-layered Ruthenate Sr${}_4$Ru${}_3$O${}_{10}$
• Wave packet dynamics in various two-dimensional systems: a unified description
• Anisotropic Magnetoresistance in Multiband Systems: 2DEGs and Polar Metals at Oxide Interfaces
• La interstitial defect-induced insulator-metal transition in oxide heterostructures LaAlO3/SrTiO3
• Anisotropic Rashba coupling to polar modes in KTaO3
• Spin-orbit controlled quantum capacitance of a polar heterostructure
• Mapping Rashba and Dresselhaus spin-orbit interactions to inversion asymmetry in perovskite oxide heterostructures
• High stability 2D electron gases formed in Si3N4/Al//KTaO3 heterostructures: synthesis and in-depth interfacial characterization
• Multi-orbital Fulde-Ferrell-Larkin-Ovchinnikov State in SrTiO_3 Heterostructures
• A Laser-ARPES View of the 2D Electron Systems at LaAlO3/SrTiO3 and Al/SrTiO3 Interfaces
• Semiclassical spin transport in LaO/STO system in the presence of multiple Rashba spin orbit couplings
• Theoretical analysis of the inverse Edelstein effect at the LaAlO${}_3$ / SrTiO${}_3$ interface with an effective tight-binding model: Important role of the second $d_{xy}$ subband
• Evidence of linear and cubic Rashba effect in non-magnetic heterostructure
• Understanding the onset of negative electronic compressibility in one- and two-band 2D electron gases: Application to LaAlO${}_3$/SrTiO${}_3$
• Two-Dimensional Charge Localization at the Perovskite Oxide Interface
• Room temperature charge-to-spin conversion from q-2DEG at SrTiO3-based interfaces
• Engineering Helical Superconductors with Multiple Majorana Kramers Pairs via Higher-Order Rashba Spin-Orbit Coupling
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• Spontaneous nonreciprocal transport in a gate-tunable ferromagnetic Rashba 2-dimensional electron gas