Possibility of realizing quantum spin Hall effect at room temperature instanene/Al2O3(0001)

2016/07/06 by Hui Wang, Shu-Ting Pi, S. T. Pi +8 · 41 citations
Materials Science · Physics and Astronomy · #Band gap #Condensed matter physics #Graphene research and applications #Materials science #Physics #Quantum and electron transport phenomena #Spin (aerodynamics) #Thermodynamics #Topological Materials and Phenomena #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.94.035112

published in Physical review. B./Physical review. B 94(3) (American Physical Society)

openalex publication_date 2016/07/06 · openalex created_date 2016/07/22 · arxiv created 2017/01/26 · arxiv updated 2018/10/12 · openalex updated_date 2026/08/05

Abstract

Two-dimensional quantum spin Hall (QSH) insulators with reasonably wide band gaps are imperative for the development of various innovative technologies. Through systematic density functional calculations and tight-binding simulations, we found that stanene on an \ensuremathα-alumina surface may possess a sizeable topologically nontrivial band gap (\ensuremath∼0.25\phantom\rule0.16em0exeV) at the \mathrm\ensuremathΓ point. Furthermore, stanene is atomically bonded to but electronically decoupled from the substrate, providing high structural stability and isolated QSH states to a large extent. The underlying physical mechanism is rather general, and this finding may lead to the opening of a new vista for the exploration of QSH insulators for room temperature device applications.

Citations

• Large-gap quantum spin Hall states in decorated stanene grown on a substrate
• Projector augmented-wave method
• Prediction of Near-Room-Temperature Quantum Anomalous Hall Effect on Honeycomb Materials
• From ultrasoft pseudopotentials to the projector augmented-wave method
• Generalized Gradient Approximation Made Simple
• Quantum Spin Hall Effect in Three Dimensional Materials: Lattice Computation of Z2 Topological Invariants and Its Application to Bi and Sb
• Topological insulators and superconductors
• Quantum Spin Hall Effect in Graphene
• Special points for Brillouin-zone integrations
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Time Reversal Polarization and a Z₂ Adiabatic Spin Pump
• Ab initiomolecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium
• Z2Topological Order and the Quantum Spin Hall Effect
• Topological Insulators
• Maximally-localized generalized Wannier functions for composite energy bands
• Epitaxial growth of two-dimensional stanene

Cited by

• Searching for large-gap quantum spin hall insulators: boron-nitride/(Pb, Sn)/α-Al 2 O 3 sandwich structures