Symmetry and correlation effects on band structure explain the anomalous transport properties of (111) LaAlO${}_3$/SrTiO${}_3$

Abstract

The interface between the two insulating oxides SrTiO${}_3$ and LaAlO${}_3$ gives rise to a two-dimensional electron system with intriguing transport phenomena, including superconductivity, which are controllable by a gate. Previous measurements on the (001) interface have shown that the superconducting critical temperature, the Hall density, and the frequency of quantum oscillations, vary nonmonotonically and in a correlated fashion with the gate voltage. In this paper we experimentally demonstrate that the (111) interface features a qualitatively distinct behavior, in which the frequency of Shubnikov-de Haas oscillations changes monotonically, while the variation of other properties is nonmonotonic albeit uncorrelated. We develop a theoretical model, incorporating the different symmetries of these interfaces as well as electronic-correlation-induced band competition. We show that the latter dominates at (001), leading to similar nonmonotonicity in all observables, while the former is more important at (111), giving rise to highly curved Fermi contours, and accounting for all its anomalous transport measurements.

arXiv comment6+7 pages, 4+6 figures, Published Version

References in corpus (41)

• Magnetic effects at the interface between nonmagnetic oxides
• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
• Unveiling a two-dimensional electron gas with universal subbands at the surface of SrTiO3
• Interface engineering of quantum Hall effects in digital transition metal oxide heterostructures
• Tuning spin-orbit coupling and superconductivity at the SrTiO3/LaAlO3 interface: a magneto-transport study
• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• A Universal Critical Density Underlying the Physics of Electrons at the LaAlO3/SrTiO3 Interface
• Orbital reconstruction and two-dimensional electron gas at the LaAlO3/SrTiO3 interface
• Dominant mobility modulation by the electric field effect at the LaAlO_3 / SrTiO_3 interface
• Two-dimensional quantum oscillations of the conductance at LaAlO3/SrTiO3 interfaces
• Superconductivity and Ferromagnetism in Oxide Interface Structures: Possibility of Finite Momentum Pairing
• High mobility conduction at (110) and (111) LaAlO3/SrTiO3 interfaces
• Ferromagnetic exchange, spin-orbit coupling and spiral magnetism at the LaAlO_3/SrTiO_3 interface
• Shubnikov-de Haas oscillations in SrTiO3\LaAlO3 interface
• Direct k-space mapping of the electronic structure in an oxide-oxide interface
• Theory of the SrTiO3 Surface State Two-Dimensional Electron Gas
• Control of a two-dimensional electron gas on SrTiO3(111) by atomic oxygen
• Quantization of Hall Resistance at the Metallic Interface between an Oxide Insulator and SrTiO${}_3$
• Massive symmetry breaking in LaAlO${}_3$/SrTiO${}_3$(111) quantum wells: a three-orbital, strongly correlated generalization of graphene
• Mixing of $t_{2g}$-$e_g$ orbitals in 4d and 5d transition metal oxides
• Doping-dependent band structure of LaAlO${}_3$/SrTiO${}_3$ interfaces by soft x-ray polarization-controlled resonant angle-resolved photoemission
• Orientational tuning of the Fermi sea of confined electrons at the SrTiO3 (110) and (111) surfaces
• Strong correlations elucidate the electronic structure and phase-diagram of LaAlO3/SrTiO3 interface
• Doped Mott Insulators in (111) Bilayers of Perovskite Transition-Metal Oxides with a Strong Spin-Orbit Coupling
• Six-fold crystalline anisotropic magnetoresistance in the (111) LaAlO${}_3$/SrTiO${}_3$ oxide interface
• Link between the Superconducting Dome and Spin-Orbit Interaction in the (111) LaAlO${}_3$/SrTiO${}_3$ Interface
• Gate-tunable band structure of the LaAlO${}_3$-SrTiO${}_3$ interface
• Competition Between Kondo Screening and Magnetism at the LaAlO${}_3$/SrTiO${}_3$ Interface
• d0 Perovskite-Semiconductor Electronic Structure
• Selection rules for Cooper pairing in two-dimensional interfaces and sheets
• Anomalous magnetic ground state in LaAlO3/SrTiO3 interface probed by transport through nanowires
• Band inversion driven by electronic correlations at the (111) LaAlO${}_3$/SrTiO${}_3$ interface
• Transition-Metal Oxide (111) bilayers
• Anisotropic, multi-carrier transport at the (111) LaAlO${}_3$/SrTiO${}_3$ interface
• Symmetry breaking at the (111) interfaces of SrTiO${}_3$ hosting a 2D-electron system
• Ab-initio Low-Energy Model of Transition-Metal-Oxide Heterostructure LaAlO3/SrTiO3
• Magnetic and nematic orders of the 2DEG at oxide (111) surfaces and interfaces
• Signatures of Electronic Nematicity in (111) LaAlO${}_3$/SrTiO${}_3$ Interfaces
• Vortex excitations in the Insulating State of an Oxide Interface
• Correlation-Induced Band Competition in SrTiO3/LaAlO3

Cited by in corpus (9)

• The quantum metric of electrons with spin-momentum locking
• Orbital design of Berry curvature: pinch points and giant dipoles induced by crystal fields
• Tunable spin and orbital Edelstein effect at (111) LaAlO${}_3$/SrTiO${}_3$ interface
• High orbital-moment Cooper pairs by crystalline symmetry breaking
• Strain-induced topological phase transition at (111) SrTiO${}_3$-based heterostructures
• Enhanced Non-linear Response by Manipulating the Dirac Point in the (111) LaTiO${}_3$/SrTiO${}_3$ Interface
• Dirac-like fermions anomalous magneto-transport in a spin-polarized oxide two-dimensional electron system
• Charge gain via solid-state gating of an oxide Mott system
• Fluctuations superconductivity and giant negative magnetoresistance in a gate voltage tuned 2D electron liquid with strong spin-orbit impurity scattering