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 (16)

• Magnetic effects at the interface between nonmagnetic oxides
• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• Avoiding the polarization catastrophe in LaAlO3 overlayers on SrTiO3(001) through a polar distortion
• Topological superconductivity and unconventional pairing in oxide interfaces
• Giant negative magnetoresistance driven by spin-orbit coupling at the LAO/STO interface
• Weak-localization and spin-orbit interaction in side-gate field effect devices at the LaAlO${}_3$/SrTiO${}_3$ interface
• Magnetic and Superconducting Ordering at LaAlO3/SrTiO3 Interfaces
• Spin responses and effective Hamiltonian for the two dimensional electron gas at oxide interface {LaAlO}${}_3$/{SrTiO}${}_3$
• Optically excited multi-band conduction in LaAlO3/SrTiO3 heterostructures
• Large Negative Electronic Compressibility of LaAlO3-SrTiO3 Interfaces with Ultrathin LaAlO3 Layers
• Magnetoconductivity in the presence of Bychkov-Rashba spin-orbit interaction
• Semiclassical theory of anisotropic transport at LaAlO3/SrTiO3 interfaces under in-plane magnetic field
• 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