Quantum spin/valley Hall effect and topological insulator phase transitions in silicene
arXiv:1206.3650 · doi:10.1063/1.4803084
Abstract
We present a theoretical realization of quantum spin and quantum valley Hall effects in silicene. We show that combination of an electric field and intrinsic spin-orbit interaction leads to quantum phase transitions at the charge neutrality point. This phase transition from a two dimensional topological insulator to a trivial insulating state is accompanied by a quenching of the quantum spin Hall effect and the onset of a quantum valley Hall effect, providing a tool to experimentally tune the topological state of silicene. In contrast to graphene and other conventional topological insulators, the proposed effects in silicene are accessible to experiments.
8 pages and 2 figures
References in corpus (19)
- The electronic properties of graphene
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
- Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
- Valley filter and valley valve in graphene
- Epitaxial Growth of a Silicene Sheet
- Low-energy effective Hamiltonian involving spin-orbit coupling in Silicene and Two-Dimensional Germanium and Tin
- Electrically Tunable Band Gap in Silicene
- Intrinsic and Rashba Spin-orbit Interactions in Graphene Sheets
- Spintronics and Pseudospintronics in Graphene and Topological Insulators
- Valley-Polarized Metals and Quantum Anomalous Hall Effect in Silicene
- Electronic structure of silicon-based nanostructures
- Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
- Spin-orbit gap of graphene: First-principles calculations
- Quantum Spin Hall Effect in Inverted Type II Semiconductors
- Topological Insulator and Helical Zero Mode in Silicene under Inhomogeneous Electric Field
- Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
- Charge and spin Hall conductivity in metallic graphene
Cited by in corpus (25)
- Topological Phases in Two-Dimensional Materials: A Brief Review
- Valley pseudospin in monolayer MoSi2N4 and MoSi2As4
- Nanomaterials for Quantum Information Science and Engineering
- AC/DC Spin and Valley Hall Effects in Silicene and Germanene
- Spin and valley polarization of plasmons in silicene due to external fields
- Spin- and valley-dependent transport through arrays of ferromagnetic silicene junctions
- Atomically Thin Quantum Spin Hall Insulators
- Quantum Spin-Valley Hall Kink States: From Concept to Materials Design
- Valley-dependent spin-orbit torques in two dimensional hexagonal crystals
- Magnetic Properties of Dirac Fermions in a Buckled Honeycomb Lattice
- Integer quantum Hall conductivity and longitudinal conductivity in silicene under the electric field and magnetic field
- Electronic transport in two-dimensional strained Dirac materials under multi-step Fermi velocity barrier: transfer matrix method for supersymmetric systems
- Beating pattern in quantum magnetotransport coefficients of spin-orbit coupled Dirac fermions in gated silicene
- Strain control of real-and lattice-spin currents in a silicene junction
- Interband and intraband transition, dynamical polarization and screening of the monolayer and bilayer silicene in low-energy tight-binding model
- Controllable intrinsic DC spin/valley Hall conductivity in ferromagnetic silicene: Exploring a fully spin/valley polarized transport
- Low-temperature linear transport of two-dimensional massive Dirac fermions in silicene: residual conductivity and spin/valley Hall effects
- Large magnetoresistance dips and perfect spin-valley filter induced by topological phase transitions in silicene
- Control of valley optical conductivity and topological phases in buckled hexagonal lattice by orientation of in-plane magnetic field
- Tailoring topological states in silicene using different halogen-passivated Si(111) substrates
- Electrically tunable magnetoplasmons in a monolayer of silicene or germanene
- Effects of electron-impurity scattering on density of states in silicene: impurity bands and band-gap narrowing
- Detection of topological states in two-dimensional Dirac systems by the dynamic spin susceptibility
- Anomalous Hall Response in Two Dimensional Topological Insulators due to the Stark Effect
- Invisible flat bands on a topological chiral edge