Absence of Giant Spin Splitting in the Two-Dimensional Electron Liquid at the Surface of SrTiO${}_3$ (001)

Abstract

We reinvestigate the putative giant spin splitting at the surface of SrTiO${}_3$ reported by Santander-Syro $etal.$ [Nature Mat. 13, 1085 (2014)]. Our spin- and angle-resolved photoemission experiments on (001) oriented surfaces supporting a two-dimensional electron liquid with high carrier density show no detectable spin polarization in the photocurrent. We demonstrate that this result excludes a giant spin splitting while it is fully consistent with the unconventional Rashba-like splitting seen in band structure calculations that reproduce the experimentally observed ladder of quantum confined subbands.

References in corpus (29)

• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Tunable Rashba spin-orbit interaction at oxide interfaces
• Coexistence of Magnetic Order and Two-dimensional Superconductivity at LaAlO${}_3$/SrTiO${}_3$ Interfaces
• Unveiling a two-dimensional electron gas with universal subbands at the surface of SrTiO3
• Creation and control of a two-dimensional electron liquid at the bare SrTiO3 surface
• 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
• Emergent quantum confinement at topological insulator surfaces
• Tailoring the nature and strength of electron-phonon interactions in the SrTiO${}_3$(001) two-dimensional electron liquid
• Origin of the two-dimensional electron gas at LaAlO3/SrTiO3 interfaces: The role of oxygen vacancies and electronic reconstruction
• Electrolyte gate-controlled Kondo effect in SrTiO3
• Quasiparticle dynamics and spin-orbital texture of the SrTiO3 two-dimensional electron gas
• Universal Fabrication of Two-Dimensional Electron Systems in Functional Oxides
• Theory of t2g electron-gas Rashba interactions
• Towards two-dimensional metallic behavior at LaAlO3/SrTiO3 interfaces
• Magnetism and superconductivity at LAO/STO-interfaces: the role of Ti 3d interface electrons
• Oxygen vacancies at titanate interfaces: two-dimensional magnetism and orbital reconstruction
• Spin-orbit splitting of the Shockley surface state on Cu(111)
• First-principles modeling of electrostatically doped perovskite systems
• Mixed Dimensionality of Confined Conducting Electrons in the Surface Region of SrTiO${}_3$
• Origin and Transport Signatures of Spin-Orbit Interactions in One- and Two-Dimensional SrTiO${}_3$-Based Heterostructures
• Doping-dependent band structure of LaAlO${}_3$/SrTiO${}_3$ interfaces by soft x-ray polarization-controlled resonant angle-resolved photoemission
• Magnetism, spin texture and in-gap states: Atomic specialization at the surface of oxygen-deficient SrTiO${}_3$
• Large modulation of the Shubnikov-de Haas oscillations by the Rashba interaction at the LaAlO${}_3$/SrTiO${}_3$ interface
• Spin responses and effective Hamiltonian for the two dimensional electron gas at oxide interface {LaAlO}${}_3$/{SrTiO}${}_3$
• Nature of Orbital and Spin Rashba Coupling in the Surface Bands of SrTiO3 and KTaO3
• k.p subband structure of the LaAlO3/SrTiO3 interface
• Spin-texture induced by oxygen vacancies in Strontium perovskites (001) surfaces: A theoretical comparison between SrTiO3 and SrHfO3

Cited by in corpus (16)

• Physics of SrTiO${}_3$-based heterostructures and nanostructures: a review
• Observation of out-of-plane spin texture in a SrTiO3 (111) two-dimensional electron gas
• Band Structure and Spin-Orbital Texture of the (111)-KTaO3 Two-Dimensional Electron Gas
• Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO${}_3$ interfaces
• Topological states at the (001) surface of SrTiO3
• Spin galvanic effect at the conducting SrTiO3 surfaces
• 2D surprises at the surface of 3D materials: confined electron systems in transition metal oxides
• Dichotomy of the Photo Induced 2-Dimensional Electron Gas on SrTiO${}_3$ Surface Terminations
• Anisotropic Electronic Structure of the Two-Dimensional Electron Gas at the AlOx/KTaO3(110) interface
• Engineered Kondo screening and nonzero Berry phase in SrTiO3/LaTiO3/SrTiO3 heterostructures
• Single spin-polarised Fermi surface in SrTiO${}_3$ thin films
• $d_{xz/yz}$ Orbital Subband Structures and Chiral Orbital Angular Momentum in the (001) Surface States of SrTiO${}_3$
• BinPo: An open-source code to compute the band structure of two-dimensional electron systems
• A Laser-ARPES View of the 2D Electron Systems at LaAlO3/SrTiO3 and Al/SrTiO3 Interfaces
• First-principles Study of Rashba Spin Splitting at Strained SrTiO3(001) Surfaces
• A two-dimensional electron gas at the (001) surface of ferromagnetic EuTiO${}_3$(001)