The mechanism of spin-orbit coupling in a 2D oxide interface

Abstract

The presence of spin-orbit coupling drives the anomalous magnetotransport at oxide interfaces and forms the basis for numerous intriguing properties of these 2D electron systems, such as topologically protected phases or anti-localization. For many of those systems, the identification of the underlying coupling mechanism is obfuscated by multi-band effects. We therefore analyze the transport of LaAlO${}_3$/SrTiO${}_3$ interfaces under high pressures, a technique to single out the multi-band contributions. We argue that the observed magnetoresistance is due to quantum interference and not related to Coulomb interaction. Therefore, this system is an excellent candidate to generate a metal-insulator transition of the long-sought symplectic 2D universality class. It is shown that the spin-orbit coupling can be linked unambiguously to the band structure with a cubic (Dresselhaus-like) rather than a linear (Rashba-like) spin-orbit band splitting.

References in corpus (59)

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• Coexistence of superconductivity and ferromagnetism in two dimensions
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• Avoiding the polarization catastrophe in LaAlO3 overlayers on SrTiO3(001) through a polar distortion
• Electric field scaling at a B=0 metal-insulator transition in two dimensions
• Orbital reconstruction and two-dimensional electron gas at the LaAlO3/SrTiO3 interface
• Profiling the interface electron gas of LaAlO3/SrTiO3 heterostructures by hard X-ray photoelectron spectroscopy
• Metal-Insulator Transition in Disordered Two-Dimensional Electron Systems
• Large capacitance enhancement and negative compressibility of two-dimensional electronic systems at LaAlO${}_3$/SrTiO${}_3$ interfaces
• Theory of t2g electron-gas Rashba interactions
• Shubnikov-de Haas oscillations in SrTiO3\LaAlO3 interface
• Direct k-space mapping of the electronic structure in an oxide-oxide interface
• Anisotropic magneto-transport effects at SrTiO3\LaAlO3 interfaces
• The Anderson Transition in Two-Dimensional Systems with Spin-Orbit Coupling
• Conduction band spin splitting and negative magnetoresistance in ${\mathrm{A}}_3{\mathrm{B}}_5$ heterostructures
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• Dilute electron gas near the metal-insulator transition in two dimensions
• Two-dimensional electron liquid state at LaAlO3-SrTiO3 interfaces
• Spin Splitting and Weak Localization in (110) GaAs/AlGaAs Quantum Wells
• Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures
• Origin and Transport Signatures of Spin-Orbit Interactions in One- and Two-Dimensional SrTiO${}_3$-Based Heterostructures
• Flow diagram of the metal-insulator transition in two dimensions
• Giant negative magnetoresistance driven by spin-orbit coupling at the LAO/STO interface
• Doping-dependent band structure of LaAlO${}_3$/SrTiO${}_3$ interfaces by soft x-ray polarization-controlled resonant angle-resolved photoemission
• Numerical estimation of the $\beta$-function in 2D systems with spin-orbit coupling
• Magnetoresistance of 2D and 3D Electron Gas in LaAlO3/SrTiO3 Heterostructures: Influence of Magnetic Ordering, Interface Scattering and Dimensionality
• Magnetic and Superconducting Ordering at LaAlO3/SrTiO3 Interfaces
• Weak-localization and spin-orbit interaction in side-gate field effect devices at the LaAlO${}_3$/SrTiO${}_3$ interface
• Critical regime of two dimensional Ando model: relation between critical conductance and fractal dimension of electronic eigenstates
• 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}${}_3$
• Metal-Insulator Transition of the LaAlO3-SrTiO3 Interface Electron System
• Metal-Insulator Transition in 2D: Experimental Test of the Two-Parameter Scaling
• Route to Topological Superconductivity via Magnetic Field Rotation
• Optically excited multi-band conduction in LaAlO3/SrTiO3 heterostructures
• Localization of Two-dimensional Electron Gas in LaAlO3/SrTiO3 Heterostructures
• Low-temperature dependence of the thermo-magnetic transport properties of the SrTiO3/LaAlO3 interface
• Large Negative Electronic Compressibility of LaAlO3-SrTiO3 Interfaces with Ultrathin LaAlO3 Layers
• Anomalous response to gate voltage application in mesoscopic LaAlO_3/SrTiO_3 devices
• Thermally excited multi-band conduction in LaAlO3/SrTiO3 heterostructures exhibiting magnetic scattering
• Metal-insulator transition at the LaAlO3/SrTiO3 interface revisited: A hybrid functional study
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• Semiclassical theory of anisotropic transport at LaAlO3/SrTiO3 interfaces under in-plane magnetic field
• A metal-insulator transition in 2D: Established facts and open questions
• Hydrostatic pressure response of an oxide two-dimensional electron system
• Anomalous magneto-transport at the superconducting interface between LaAlO3 and SrTiO3
• Transport and thermoelectric properties of the LaAlO${}_3$/SrTiO${}_3$ interface
• Spin-orbit controlled quantum capacitance of a polar heterostructure

Cited by in corpus (9)

• Tuning Rashba spin-orbit coupling at LaAlO3/SrTiO3 interfaces by band filling
• Oxygen vacancies and hydrogen doping in LaAlO3/SrTiO3 heterostructures: electronic properties and impact on surface and interface reconstruction
• Possible Flexoelectric Origin of the Lifshitz Transition in LaAlO${}_3$/SrTiO${}_3$ Interfaces
• Multi-band character revealed from Weak-antilocalization effect in Platinum thin films
• Anti-Localization in Oxides: Effective Spin-3/2 Model
• Electronic transport in thin films of BaPbO${}_3$: Unraveling two-dimensional quantum effects
• Anisotropic magnetotransport in LaAlO${}_3$/SrTiO${}_3$ nanostructures
• Spin Hall and Edelstein effects in a ballistic quantum dot with Rashba spin-orbit coupling
• Magnetotransport of Functional Oxide Heterostructures Affected by Spin-Orbit Coupling: A Tale of Two-Dimensional Systems