Theory of the spin galvanic effect at oxide interfaces

Abstract

The spin galvanic effect (SGE) describes the conversion of a non-equilibrium spin polarization into a transverse charge current. Recent experiments have demonstrated a large conversion efficiency for the two-dimensional electron gas formed at the interface between two insulating oxides, LaAlO${}_3$ and SrTiO${}_3$. Here we analyze the SGE for oxide interfaces within a three-band model for the Ti t${}_{2g}$ orbitals which displays an interesting variety of effective spin-orbit couplings in the individual bands that contribute differently to the spin-charge conversion. Our analytical approach is supplemented by a numerical treatment where we also investigate the influence of disorder and temperature, which turns out to be crucial to provide an appropriate description of the experimental data.

arXiv comment5 pages, 3 figures

References in corpus (10)

• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Highly efficient and tuneable spin-to-charge conversion through Rashba coupling at oxide interfaces
• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• Inverse Edelstein Effect
• Observation of Inverse Edelstein Effect in Rashba-Split 2DEG between SrTiO3 and LaAlO3 at Room Temperature
• Theory of t2g electron-gas Rashba interactions
• Origin and Transport Signatures of Spin-Orbit Interactions in One- and Two-Dimensional SrTiO${}_3$-Based Heterostructures
• Spin responses and effective Hamiltonian for the two dimensional electron gas at oxide interface {LaAlO}${}_3$/{SrTiO}${}_3$
• k.p subband structure of the LaAlO3/SrTiO3 interface
• Theoretical models of Rashba spin splitting in asymmetric SrTiO3-based heterostructures

Cited by in corpus (21)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Quantum Materials for Spin and Charge Conversion
• Planar Hall Effect and Anisotropic Magnetoresistance in a polar-polar interface of LaVO${}_3$-KTaO${}_3$ with strong spin-orbit coupling
• Spin and orbital Edelstein effect in an oxide two-dimensional electron gas: theory and application to AlO${}_x$/SrTiO${}_3$
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Boundary conditions for spin and charge diffusion in the presence of interfacial spin-orbit coupling
• Nonreciprocal superconducting transport and the spin Hall effect in gyrotropic structures
• Spin to charge conversion at Rashba-split SrTiO${}_3$ interfaces from resonant tunneling
• Strain Engineering of the Intrinsic Spin Hall Conductivity in a SrTiO${}_3$ Quantum Well
• Current-induced spin polarization in isotropic k-cubed Rashba model: Theoretical study for p-doped semiconductor heterostructures and perovskite oxides interfaces
• Thermal generation of shift electric current
• Spin and orbital Edelstein effect in spin-orbit coupled noncentrosymmetric superconductor
• Semiclassical spin transport in LaO/STO system in the presence of multiple Rashba spin orbit couplings
• Edelstein Effect in Isotropic and Anisotropic Rashba Models
• 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
• Tunneling anisotropic spin galvanic effect
• Photogalvanic Effect in Silicene
• Anomalous Hall and Nernst effects in a two-dimensional electron gas with an anisotropic cubic Rashba spin-orbit interaction
• Boltzmann theory of the inverse Edelstein effect in a two-dimensional Rashba gas
• Interface controlled Berry phase and anisotropic spin-charge conversion in altermagnet-topological insulator bilayers
• Bilinear magnetoresistance in 2DEG with isotropic cubic Rashba spin-orbit interaction