Intrinsic instability of electronic interfaces with strong Rashba coupling

Abstract

We consider a model for the two-dimensional electron gas formed at the interface of oxide heterostructures, which includes a Rashba spin-orbit coupling proportional to the electric field perpendicular to the interface. Based on the standard mechanism of polarity catastrophe, we assume that the electric field is proportional to the electron density. Under these simple and general assumptions, we show that a phase separation instability occurs for realistic values of the spin-orbit coupling and of the band parameters. This could provide an intrinsic mechanism for the recently observed inhomogeneous phases at the LaAlO_3/SrTiO_3 or LaTiO_3/SrTiO_3 interfaces.

5 pages, 4 figures

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Cited by in corpus (42)

• 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
• Giant negative magnetoresistance driven by spin-orbit coupling at the LAO/STO interface
• Phase separation from electron confinement at oxide interfaces
• Multi-band superconductivity and nanoscale inhomogeneity at oxide interfaces
• Spectroscopic evidence for negative electronic compressibility in a quasi-three-dimensional spin-orbit correlated metal
• Non-linear $IV$ characteristics in two-dimensional superconductors: Berezinskii-Kosterlitz-Thouless physics vs inhomogeneity
• New insights into the electron trapping mechanism in LaAlO_3 / SrTiO3 heterostructures
• Phase diagrams of voltage-gated oxide interfaces with strong Rashba coupling
• Multi-Orbital Superconductivity in SrTiO3 /LaAlO3 Interface and SrTiO3 Surface
• Modulation of the superconducting critical temperature due to quantum confinement at the LaAlO${}_3$/SrTiO${}_3$ interface
• Spin-Orbit Coupling in LaAlO${}_3$/SrTiO${}_3$ interfaces: Magnetism and Orbital Ordering
• High sensitivity variable-temperature infrared nanoscopy of conducting oxide interfaces
• Spin-texture induced by oxygen vacancies in Strontium perovskites (001) surfaces: A theoretical comparison between SrTiO3 and SrHfO3
• Inhomogeneous multi-carrier superconductivity at LaXO3/SrTiO3 (X=Al or Ti) oxide interfaces
• Negative electronic compressibility and nanoscale inhomogeneity in ionic-liquid gated two-dimensional superconductors
• Pseudo-gap in tunneling spectra as a signature of inhomogeneous superconductivity in oxide interfaces
• Oxygen vacancies and hydrogen doping in LaAlO3/SrTiO3 heterostructures: electronic properties and impact on surface and interface reconstruction
• Semiclassical theory of anisotropic transport at LaAlO3/SrTiO3 interfaces under in-plane magnetic field
• Spin-orbit coupling controlling the superconducting dome of artificial superlattices of quantum wells
• Intrinsic spin Hall effect in systems with striped spin-orbit coupling
• Capacitance and compressibility of heterostructures with strong electronic correlations
• Multigaps superconductivity at unconventional Lifshitz transition in a 3D Rashba heterostructure at atomic limit
• Anisotropic electronic transport of the two-dimensional electron system in Al2O3/SrTiO3 heterostructures
• Charge-Density Waves vs. Superconductivity: Some Results and Future Perspectives
• High-Tc superconducting dome in artificial heterostructures made of nanoscale quantum building blocks
• Magnetic and transport signatures of Rashba spin-orbit coupling on the ferromagnetic Kondo lattice model in two dimensions
• Flux-flow instability across Berezinskii Kosterlitz Thouless phase transition in KTaO${}_3$ (111) based superconductor
• Possible mechanisms of electronic phase separation in oxide interfaces
• Density inhomogeneities and Rashba spin-orbit coupling interplay in oxide interfaces
• Helical currents in metallic Rashba strips
• Phase separation and long wave-length charge instabilities in spin-orbit coupled systems
• Spin-orbit controlled quantum capacitance of a polar heterostructure
• Structural and electronic phenomena at oxyfluoride KTaO${}_3$/K$M$F${}_3$ ($M$ = Zn and Ni) superlattices: Rashba splitting and 2DEG
• Interplay between density and superconducting quantum critical fluctuations
• Effect of spin-orbit interaction on the vortex dynamics in LaAlO${}_3$/SrTiO${}_3$ interfaces near the superconducting transition
• Longitudinal optical and spin-Hall conductivities of Rashba conducting strips coupled to ferro- and antiferromagnetic layers
• Density driven fluctuations in a two-dimensional superconductor
• Valley polarization generated in 3-dimensional group-IV monochalcogenids
• Superfluid response of two-dimensional filamentary superconductors
• Transport properties of Rashba conducting strips coupled to magnetic moments with spiral order
• Self-organized electronic superlattices in layered materials