Maximal Rashba-like spin splitting via kinetic energy-driven inversion symmetry breaking

Abstract

Engineering and enhancing inversion symmetry breaking in solids is a major goal in condensed matter physics and materials science, as a route to advancing new physics and applications ranging from improved ferroelectrics for memory devices to materials hosting Majorana zero modes for quantum computing. Here, we uncover a new mechanism for realising a much larger energy scale of inversion symmetry breaking at surfaces and interfaces than is typically achieved. The key ingredient is a pronounced asymmetry of surface hopping energies, i.e. a kinetic energy-driven inversion symmetry breaking, whose energy scale is pinned at a significant fraction of the bandwidth. We show, from spin- and angle-resolved photoemission, how this enables surface states of 3d and 4d-based transition-metal oxides to surprisingly develop some of the largest Rashba-like spin splittings that are known. Our findings open new possibilities to produce spin textured states in oxides which exploit the full potential of the bare atomic spin-orbit coupling, raising exciting prospects for oxide spintronics. More generally, the core structural building blocks which enable this are common to numerous materials, providing the prospect of enhanced inversion symmetry breaking at judiciously-chosen surfaces of a plethora of compounds, and suggesting routes to interfacial control of inversion symmetry breaking in designer heterostructures.

References in corpus (22)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• New Perspectives for Rashba Spin-Orbit Coupling
• Tunable Rashba spin-orbit interaction at oxide interfaces
• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• Giant Spin-splitting in the Bi/Ag(111) Surface Alloy
• Highly efficient and tuneable spin-to-charge conversion through Rashba coupling at oxide interfaces
• Large tuneable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3
• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• Orbital-Angular-Momentum Based Origin of Rashba-Type Surface Band Splitting
• The properties of ultrapure delafossite metals
• Quasiparticle dynamics and spin-orbital texture of the SrTiO3 two-dimensional electron gas
• Chiral orbital-angular-momentum in the surface states of Bi2Se3
• Theory of t2g electron-gas Rashba interactions
• Detecting Chiral Orbital Angular Momentum by Circular Dichroism ARPES
• Very Efficient Spin Polarization Analysis (VESPA): New Exchange Scattering-based Setup for Spin-resolved ARPES at APE-NFFA Beamline at Elettra
• Orbital Symmetry and Electron Correlation in Na_{x}CoO_2
• Hierarchical spin-orbital polarisation of a giant Rashba system
• Spin and orbital degrees of freedom in transition metal oxides and oxide thin films studied by soft x-ray absorption spectroscopy
• Electronic Structure of the Metallic Antiferromagnet PdCrO${}_2$ Measured by Angle-Resolved Photoemission Spectroscopy
• RKKY interaction in a disordered two-dimensional electron gas with Rashba and Dresselhaus spin-orbit couplings
• A Tight-Binding Investigation of the NaxCoO2 Fermi Surface
• Weak and strong coupling limits of the two-dimensional Fröhlich polaron with spin-orbit Rashba interaction

Cited by in corpus (65)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Observation of the orbital Hall effect in a light metal Ti
• Orbitronics: Orbital Currents in Solids
• Orbital Torque: Torque Generation by Orbital Current Injection
• Observation of the Orbital Rashba-Edelstein Magnetoresistance
• Oxide spin-orbitronics: spin-charge interconversion and topological spin textures
• Orbital Rashba effect in surface oxidized Cu film
• Experimental observation of hidden Berry curvature in inversion-symmetric bulk 2H-WSe2
• Band resolved imaging of photocurrent in a topological insulator
• Orbital-driven Rashba effect in a binary honeycomb monolayer AgTe
• Highly conductive PdCoO2 ultrathin films for transparent electrodes
• Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO${}_2$
• Orbital Complexity in Intrinsic Magnetic Topological Insulators MnBi${}_4$Te${}_7$ and MnBi${}_6$Te${}_{10}$
• Computational Framework for Angle-Resolved Photoemission Spectroscopy
• Directional ballistic transport in the two-dimensional metal PdCoO2
• Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO${}_3$ interfaces
• Growth of metallic delafossite PdCoO2 by molecular beam epitaxy
• Momentum-space signatures of Berry flux monopoles in a Weyl semimetal
• Sign reversal diode effect in superconducting Dayem nanobridges
• Dynamic Rashba-Dresselhaus Effect
• Electronically driven spin-reorientation transition of the correlated polar metal Ca${}_3$Ru${}_2$O${}_7$
• Colossal orbital-Edelstein effect in non-centrosymmetric superconductors
• $h/e$ Oscillations in Interlayer Transport of Delafossites
• Mechanism of antisymmetric spin polarization in centrosymmetric multiple-$Q$ magnets based on bilinear and biquadratic spin cross products
• Role of Disorder in the Intrinsic Orbital Hall Effect
• Anomalous Hall effect at the spontaneously electron-doped polar surface of PdCoO2 ultrathin films
• Spectroscopic Signatures of Gate-Controlled Superconducting Phases
• From basic properties to the Mott design of correlated delafossites
• Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
• Dual quantum confinement and anisotropic spin splitting in the multi-valley semimetal PtSe${}_2$
• Orbitronics in Two-dimensional Materials
• Tuneable electron-magnon coupling of ferromagnetic surface states in PdCoO${}_2$
• Growth of CuFeO${}_2$ Single Crystals by the Optical Floating-Zone Technique
• Quantum Oscillations of the Quasiparticle Lifetime in a Metal
• Quasiparticle interference and quantum confinement in a correlated Rashba spin-split 2D electron liquid
• Nonreciprocal transport in a Rashba ferromagnet, delafossite PdCoO${}_2$
• Weyl-like points from band inversions of spin-polarised surface states in NbGeSb
• Microscopic study of orbital textures
• Theory of Difference Frequency Quantum Oscillations
• Phase diagram of the square lattice Hubbard model with Rashba-type antisymmetric spin-orbit coupling
• Metallic delafossite thin films for unique device applications
• Determination of the phase coherence length of PdCoO${}_2$ nanostructures
• Ferromagnetic fluctuations in the Rashba-Hubbard model
• Berry curvature in monolayer MoS${}_2$ with broken mirror symmetry
• Observation of the anomalous Hall effect in a layered polar semiconductor
• The Fermi surface of PtCoO2 from quantum oscillations and electronic structure calculations
• Spin splitting and spin Hall conductivity in buckled monolayers of the group 14: First-principles calculations
• Avoided metallicity in a hole-doped Mott insulator on a triangular lattice
• Buried Moire supercells through SrTiO${}_3$ nanolayer relaxation
• Investigation of Planckian behavior in a high-conductivity oxide: PdCrO${}_2$
• Giant Rashba-type spin splitting through spin-dependent interatomic-hopping
• Observation of spin splitting in the surface electronic structure of antiferromagnet NdBi
• Engineering spin-orbit effects and Berry curvature by deposition of Eu on WSe${}_2$
• Fully two-dimensional incommensurate charge modulation on the Pd-terminated polar surface of PdCoO2
• Spin and orbital Edelstein effect in spin-orbit coupled noncentrosymmetric superconductor
• $T-$linear resistivity from magneto-elastic scattering: application to PdCrO${}_2$
• Adsorbate-induced formation of a surface-polarity-driven nonperiodic superstructure
• Weyl semimetallic, Néel, spiral, and vortex states in the Rashba-Hubbard model
• Enhancement of Giant Rashba Splitting in BiTeI under Asymmetric Interlayer Interaction
• Dichotomy of electron-phonon interactions in the delafossite PdCoO${}_2$: From weak bulk to polaronic surface coupling
• In situ modification of delafossite type PdCoO2 bulk single crystal for reversible hydrogen sorption and fast hydrogen evolution
• Spin-orbit effects at chiral surfaces
• Ubiquitous Ideal Spin-Orbit Coupling in a Screw Dislocation in Semiconductors
• Twin-domain formation in epitaxial triangular lattice delafossites