Proximity-induced giant spin-orbit interaction in epitaxial graphene on topological insulator

Abstract

Heterostructures of Dirac materials such as graphene and topological insulators provide interesting platforms to explore exotic quantum states of electrons in solids. Here we study the electronic structure of graphene-Sb2Te3 heterostructure using density functional theory and tight-binding methods. We show that the epitaxial graphene on Sb2Te3 turns into quantum spin-Hall phase due to its proximity to the topological insulating Sb2Te3. It is found that the epitaxial graphene develops a giant spin-orbit gap of about ~20 meV, which is about three orders of magnitude larger than that of pristine graphene. We discuss the origin of such enhancement of the spin-orbit interaction and possible outcomes of the spin-Hall phase in graphene.

References in corpus (10)

• Energy Gaps in Graphene Nanoribbons
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Bipolar supercurrent in graphene
• Intrinsic and Rashba Spin-orbit Interactions in Graphene Sheets
• Spin-orbit gap of graphene: First-principles calculations
• Phase Coherent Transport of Charges in Graphene Quantum Billiard
• First Principles Studies on 3-Dimentional Strong Topological Insulators: Bi2Te3, Bi2Se3 and Sb2Te3
• Spatial Fluctuations of Helical Dirac Fermions on the Surface of Topological Insulators
• Fermi Level Tuning of Epitaxial Sb2Te3 Thin Films on Graphene by Regulating Intrinsic Defects and Substrate Transfer Doping
• Geometrical engineering of a two-bands Chern insulator in two dimensions with arbitrary topological index

Cited by in corpus (52)

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• Transport in two-dimensional topological materials: recent developments in experiment and theory
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• Graphene-based topological insulator with an intrinsic bulk band gap above room temperature
• Proximity effect in graphene-topological insulator heterostructures
• Spin Proximity Effects in Graphene/Topological Insulator Heterostructures
• Spin-valley filtering in strained graphene structures with artificially induced carrier mass and spin-orbit coupling
• Giant Edelstein effect in Topological-Insulator--Graphene heterostructures
• Current-induced spin polarization in topological insulator-graphene heterostructures
• A moiré superlattice on the surface of a topological insulator
• Resonant photovoltaic effect in doped magnetic semiconductors
• Interplay between spin-orbit interactions and a time-dependent electromagnetic field in monolayer graphene
• Multiple Quantum Phases in Graphene with Enhanced Spin-Orbit Coupling: From the Quantum Spin Hall Regime to the Spin Hall Effect and a Robust Metallic State
• Proximity induced spin orbit effects in graphene on Au
• Gate-Tunable Tunneling Resistance in Graphene/Topological Insulator Vertical Junctions
• General conditions for proximity-induced odd-frequency superconductivity in two-dimensional electronic systems
• Proximity Enhanced Quantum Spin Hall State in Graphene
• Heterostructures of graphene and topological insulators Bi${}_2$Se${}_3$, Bi${}_2$Te${}_3$, and Sb${}_2$Te${}_3$
• Ground state of graphene heterostructures in the presence of random charged impurities
• Single and bilayer graphene on the topological insulator Bi${}_2$Se${}_3$: Electronic and spin-orbit properties from first principles
• Chirality-induced spin texture switching in twisted bilayer graphene
• Proximity magnetoresistance in graphene induced by magnetic insulators
• Van der Waals heterostructures with spin-orbit coupling
• Tunneling in graphene-topological insulator hybrid devices
• Enhanced photogalvanic effect in graphene due to Rashba spin-orbit coupling
• Twist-angle dependent proximity induced spin-orbit coupling in graphene/topological insulator heterostructures
• Induced exchange and spin-orbit effects by proximity in graphene on Ni and Co
• Magnetotransport signatures of the proximity exchange and spin-orbit couplings in graphene
• Experimental Observation of Two Massless Dirac-Fermion Gases in Graphene-Topological Insulator Heterostructure
• Valley-dependent spin-orbit torques in two dimensional hexagonal crystals
• Dirac Fermion Cloning, Moir$\acute{\mathbf{e}}$ Flat Bands and Magic Lattice Constants in Epitaxial Monolayer Graphene
• Evidence for topological proximity effect in graphene coupled to topological insulator
• Transmission spectra and valley processing of graphene and carbon nanotube superlattices with inter-valley coupling
• Magic angle conditions for twisted 3D topological insulators
• Proximity-Induced Spin-Orbit Coupling in Graphene-Bi${}_{1.5}$Sb${}_{0.5}$Te${}_{1.7}$Se${}_{1.3}$ Heterostructures
• Opening Band Gap without Breaking Lattice Symmetry: A New Route toward Robust Graphene-Based Nanoelectronics
• High density carriers at a strongly coupled graphene-topological insulator interface
• Graphene with wedge disclination in the presence of intrinsic and Rashba spin orbit couplings
• Effect of a spin-active interface on proximity-induced superconductivity in topological insulators
• Quantum Transport of Dirac fermions in graphene with a spatially varying Rashba spin-orbit coupling
• Floquet topological transition by unpolarized light
• First-principles study on the electronic and transport properties of periodically nitrogen-doped graphene and carbon nanotube superlattices
• Relaxation times and charge conductivity of silicene
• Influence of interface-induced valley-Zeeman and spin-orbit couplings\\ on transport in graphene-on-WSe${}_2$ heterostructures
• Transmission in graphene-topological insulator heterostructures
• Topological Phases in Fractals: Local Spin Chern Marker in the Sierpinski carpet Kane-Mele-Rashba Model
• Realization of Kane-Mele Model in $X{\mathbf{N}}_4$-Embedded Graphene ($X$=Pt, Ir, Rh, Os)
• Spin-charge coupled transport in van der Waals systems with random tunneling
• Exploring Structural and Electronic Properties of Topological Insulator/Graphene Nano-heterostructures
• Valley-Polarized Quantum Anomalous Hall Phase in Bilayer Graphene with Layer-Dependent Proximity Effects