Nature of Orbital and Spin Rashba Coupling in the Surface Bands of SrTiO3 and KTaO3

Abstract

Tight-binding models for the recently observed surface electronic bands of SrTiO3 and KTaO3 are analyzed with a view to bringing out the relevance of momentum-space chiral angular momentum structures of both orbital and spin origins. Depending on the strength of electric field associated with inversion symmetry breaking at the surface, the orbital and the accompanying spin angular momentum structures reveal complex linear and cubic dependencies in the momentum k (linear and cubic Rashba effects, respectively) in a band-specific manner. Analytical expressions for the cubic orbital and spin Rashba effects are derived by way of unitary transformation technique we developed, and compared to numerical calculations. Due to the C4v symmetry of the perovskite structure the cubic Rashba effect appears as in-plane modulations.

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Cited by in corpus (27)

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• Observation of out-of-plane spin texture in a SrTiO3 (111) two-dimensional electron gas
• Electrically Tunable Superconductivity Through Surface Orbital Polarization
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• Giant switchable Rashba effect in oxide heterostructures
• Dual quantum confinement and anisotropic spin splitting in the multi-valley semimetal PtSe${}_2$
• High-temperature large-gap quantum anomalous Hall insulator in ultrathin double perovskite films
• 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${}_3$
• Gate tunable anomalous Hall effect: a Berry curvature probe at oxides interfaces
• Anisotropic Electronic Structure of the Two-Dimensional Electron Gas at the AlOx/KTaO3(110) interface
• Orbital tunable 0-$\pi$ transitions in Josephson junctions with noncentrosymmetric topological superconductors
• Anomalous Josephson Coupling and High-Harmonics in Non-Centrosymmetric Superconductors with $S$-wave Spin-Triplet Pairing
• Dislocation Majorana zero modes in perovskite oxide 2DEG
• Spin-Orbital Hallmarks of Unconventional Superconductors Without Inversion Symmetry
• Gate control of superconductivity in mesoscopic all-metallic devices
• Rashba-like spin-orbit interaction and spin texture at the KTaO${}_{\text{3}}$ (001) surface from DFT calculations
• High orbital-moment Cooper pairs by crystalline symmetry breaking
• $d_{xz/yz}$ Orbital Subband Structures and Chiral Orbital Angular Momentum in the (001) Surface States of SrTiO${}_3$
• Mapping Rashba and Dresselhaus spin-orbit interactions to inversion asymmetry in perovskite oxide heterostructures
• Spin texture driven spintronic enhancement at the LaAlO${}_3$/SrTiO${}_3$ interface
• Tunable correlation effects of magnetic impurities by the cubic Rashba spin-orbit couplings
• Spin and orbital Edelstein effect in spin-orbit coupled noncentrosymmetric superconductor
• Engineering Helical Superconductors with Multiple Majorana Kramers Pairs via Higher-Order Rashba Spin-Orbit Coupling
• Particle-hole spectral asymmetry at the edge of multiorbital noncentrosymmetric superconductors
• Rashba splitting in polar-nonpolar sandwich heterostructure : A DFT Study
• Proximity-induced Rashba spin-orbit interaction in BaMnO${}_{\text{3}}|$KTaO${}_{\text{3}}$ heterostructure for antiferromagnetic spintronics