Observation of out-of-plane spin texture in a SrTiO3 (111) two-dimensional electron gas

Abstract

We explore the second order bilinear magnetoelectric resistance (BMER) effect in the d-electron-based two-dimensional electron gas (2DEG) at the SrTiO3 (111) surface. We find an evidence of a spin-split band structure with the archetypal spin-momentum locking of the Rashba effect for the in-plane component. Under an out-of-plane magnetic field, we find a BMER signal that breaks the six-fold symmetry of the electronic dispersion, which is a fingerprint for the presence of a momentum dependent out-of-plane spin component. Relativistic electronic structure calculations reproduce this spin-texture and indicate that the out-of-plane component is a ubiquitous property of oxide 2DEGs arising from strong crystal field effects. We further show that the BMER response of the SrTiO3 (111) 2DEG is tunable and unexpectedly large.

arXiv comment16 pages, 4 figures

References in corpus (24)

• New Perspectives for Rashba Spin-Orbit Coupling
• Tunable Rashba spin-orbit interaction at oxide interfaces
• Highly efficient and tuneable spin-to-charge conversion through Rashba coupling at oxide interfaces
• Unidirectional spin Hall magnetoresistance in ferromagnet/normal metal bilayers
• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• Inverse Edelstein Effect
• Bilinear magneto-electric resistance as a probe of three-dimensional spin texture in topological surface states
• Observation of Inverse Edelstein Effect in Rashba-Split 2DEG between SrTiO3 and LaAlO3 at Room Temperature
• Topological insulators from complex orbital order in transition-metal oxides heterostructures
• Quasiparticle dynamics and spin-orbital texture of the SrTiO3 two-dimensional electron gas
• Towards two-dimensional metallic behavior at LaAlO3/SrTiO3 interfaces
• Theory of the SrTiO3 Surface State Two-Dimensional Electron Gas
• Room Temperature Giant Charge-to-Spin Conversion at SrTiO3/LaAlO3 Oxide Interface
• Control of a two-dimensional electron gas on SrTiO3(111) by atomic oxygen
• Nonlinear spin current generation in noncentrosymmetric spin-orbit coupled systems
• Theory of unidirectional spin Hall magnetoresistance in heavy-metal/ferromagnetic-metal bilayers
• Massive symmetry breaking in LaAlO${}_3$/SrTiO${}_3$(111) quantum wells: a three-orbital, strongly correlated generalization of graphene
• Orientational tuning of the Fermi sea of confined electrons at the SrTiO3 (110) and (111) surfaces
• Six-fold crystalline anisotropic magnetoresistance in the (111) LaAlO${}_3$/SrTiO${}_3$ oxide interface
• Magnetism, spin texture and in-gap states: Atomic specialization at the surface of oxygen-deficient SrTiO${}_3$
• Magnetoresistance of 2D and 3D Electron Gas in LaAlO3/SrTiO3 Heterostructures: Influence of Magnetic Ordering, Interface Scattering and Dimensionality
• Nature of Orbital and Spin Rashba Coupling in the Surface Bands of SrTiO3 and KTaO3
• Absence of Giant Spin Splitting in the Two-Dimensional Electron Liquid at the Surface of SrTiO${}_3$ (001)
• Spin galvanic effect at the conducting SrTiO3 surfaces

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