Giant topological insulator gap in graphene with 5d adatoms

Abstract

Two-dimensional topological insulators (2D TIs) have been proposed as platforms for many intriguing applications, ranging from spintronics to topological quantum information processing. Realizing this potential will likely be facilitated by the discovery of new, easily manufactured materials in this class. With this goal in mind we introduce a new framework for engineering a 2D TI by hybridizing graphene with impurity bands arising from heavy adatoms possessing partially filled d-shells, in particular osmium and iridium. First principles calculations predict that the gaps generated by this means exceed 0.2 eV over a broad range of adatom coverage; moreover, tuning of the Fermi level is not required to enter the TI state. The mechanism at work is expected to be rather general and may open the door to designing new TI phases in many materials.

7 pages, 8 figures

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Cited by in corpus (82)

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• Colloquium: Topological Band Theory
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• Colloquium: Spintronics in graphene and other two-dimensional materials
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• Epitaxial growth of large-gap quantum spin Hall insulator on semiconductor surface
• Adsorption and absorption of Boron, Nitrogen, Aluminium and Phosphorus on Silicene: stability, electronic and phonon properties
• Model spin-orbit coupling Hamiltonians for graphene systems
• Quantum interference and Aharonov-Bohm oscillations in topological insulators
• Tunable spin-orbit coupling and symmetry-protected edge states in graphene/WS${}_2$
• New Family of Robust 2D Topological Insulators in van der Waals Heterostructures
• Indirect Exchange and Ruderman-Kittel-Kasuya-Yosida (RKKY) Interactions in Magnetically-Doped Graphene
• Spin-valley filtering in strained graphene structures with artificially induced carrier mass and spin-orbit coupling
• Giant thermoelectric effect in graphene-based topological insulators with nanopores
• Formation of quantum spin Hall state on Si surface and energy gap scaling with strength of spin orbit coupling
• Single-Valley Engineering in Graphene Superlattices
• Atomically Thin Quantum Spin Hall Insulators
• Spin-Orbit Interaction Induced in Graphene by Transition-Metal Dichalcogenides
• Two-Dimensional Transition Metal Dichalcogenides with a Hexagonal Lattice: Room Temperature Quantum Spin Hall Insulators
• Bound States of Conical Singularities in Graphene-Based Topological Insulators
• Neutral-current Hall effects in disordered graphene
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• Chern Half Metals: A New Class of Topological Materials to Realize the Quantum Anomalous Hall Effect
• Evidence for a quantum-spin-Hall phase in graphene decorated with Bi2Te3 nanoparticles
• Substitutional 4d and 5d Impurities in Graphene
• Topological phases in gated bilayer graphene: Effects of Rashba spin-orbit coupling and exchange field
• Topological states of non-Dirac electrons on triangular lattice
• 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
• Spin-orbit-controlled metal-insulator transition in Sr${}_2$IrO${}_4$
• Transport in indium-decorated graphene
• Kondo versus indirect exchange: the role of the lattice and the actual range of RKKY interactions in real materials
• Disorder Effects in Topological States -- Brief Review of the Recent Developments
• New class of 3D topological insulator in double perovskite
• Copper adatoms on graphene: theory of orbital and spin-orbital effects
• Majorana Fermions in Honeycomb Lattices
• Laser-beam patterned topological insulating states on thin semiconducting MoS2
• Corner states of topological fullerenes
• Quantum anomalous Hall phase in (001) double-perovskite monolayers via intersite spin-orbit coupling
• Topological crystalline insulator phase in graphene multilayers
• Extrinsic Spin Hall Effect from Anisotropic Rashba Spin-Orbit Coupling in Graphene
• Intercalation of graphene on SiC(0001) via ion-implantation
• Bandgap-Assisted Quantum Control of Topological Edge States in a Cavity
• Spin-orbit coupling in methyl functionalized graphene
• Topological Phases in Triangular Lattices of Ru Adsorbed on Graphene: ab-initio calculations
• Engineering quantum anomalous Hall phases with orbital and spin degrees of freedom
• Coupled Spin and Pseudo-magnetic Field in Graphene Nanoribbons
• Chern insulators without band inversion in MoS2 monolayers with 3d adatoms
• Evidence for topological proximity effect in graphene coupled to topological insulator
• Electronic transport properties of Ir-decorated graphene
• Spin-orbit interaction in Pt or Bi2Te3 nanoparticle-decorated graphene realized by a nanoneedle method
• Electronic transport and scattering times in tungsten-decorated graphene
• Alkali doping of graphene: the crucial role of high temperature annealing
• First-principles investigation of the effect of substitution and surface adsorption on magnetostrictive properties of Fe-Ga alloys
• Influence of interface-induced valley-Zeeman and spin-orbit couplings\\ on transport in graphene-on-WSe${}_2$ heterostructures
• Transition-metal phthalocyanine monolayers as new Chern insulators
• Unexpected hole doping of graphene by osmium adatoms
• Topological spin-singlet superconductors with underlying sublattice structure
• Large Rashba Spin-Orbit Coupling and High-Temperature Quantum Anomalous Hall Effect in Re-Intercalated Graphene/CrI${}_3$ Heterostructure
• Alloying-induced topological transition in 2D transition-metal dichalcogenide semiconductors
• Manipulating Z2 and Chern topological phases in a single material using periodically driving fields
• Many-Body Effects in Topological Kondo Insulators
• Weak localization measurements of electronic scattering rates in Li-doped epitaxial graphene
• Spin-1 two-impurity Kondo problem on a lattice
• Realizing robust large-gap quantum spin Hall state in 2D HgTe monolayer on insulating substrate
• Electron-spin to Phonon Coupling in Graphene Decorated with Heavy Adatoms
• Spin-orbit interaction and snake states in graphene $p$-$n$ junctions
• Realization of Kane-Mele Model in $X{\mathbf{N}}_4$-Embedded Graphene ($X$=Pt, Ir, Rh, Os)
• An anomalous band inversion protected by symmetry in a topological insulator of the Kane-Mele model
• Fano-shaped impurity spectral density, electric-field-induced in-gap state and local magnetic moment of an adatom on trilayer graphene
• Stacking-Mediated Diffusion of Ruthenium Nanoclusters in Graphite
• Engineering Majorana corner modes from two-dimensional hexagonal crystals
• Magnetic correlation between two local spins in a quantum spin Hall insulator
• Vortex Solutions and a Novel Role for R-parity in an N=2-Supersymmetric Model for Graphene
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• Detecting degeneracy and subtle broken-symmetry states of graphene at nanoscale
• Unconventional quantized edge transport in the presence of inter-edge coupling in intercalated graphene
• Strain-engineering quantum anomalous Hall effect in janus MnBi2SexTe4-x monolayers
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• Chiral Majorana Fermions in two dimensional square lattice antiferromagnet with proximity-induced superconductivity
• Artificial Gauge Field and Quantum Spin Hall States in a Conventional Two-dimensional Electron Gas
• Topological features of hydrogenated graphene
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