Large-Gap Quantum Spin Hall Insulator in single layer bismuth monobromide Bi${}_4$Br${}_4$

Abstract

Quantum spin Hall (QSH) insulators have gapless topological edge states inside the bulk band gap, which can serve as dissipationless spin current channels protected by the time-reversal symmetry. The major challenge currently is to find suitable materials for this topological state. Here, we predict a new large-gap QSH insulator with bulk direct band gap of $\sim$0.18 eV, in single-layer Bi${}_4$Br${}_4$, which could be exfoliated from its three-dimensional bulk material due to the weakly-bonded layered structure. The band gap of single-layer Bi${}_4$Br${}_4$ is tunable via strain engineering, and the QSH phase is robust against external strain. In particular, because this material consists of special one-dimensional molecular chain as its basic building block, the single layer Bi${}_4$Br${}_4$ could be easily torn to ribbons with clean and atomically sharp edges, which are much desired for the observation and application of topological edge states. Our work thus provides a new promising material for experimental studies and practical applications of QSH effect.

References in corpus (24)

• Electric Field Effect in Atomically Thin Carbon Films
• Topological Insulators
• Topological insulators and superconductors
• Two Dimensional Atomic Crystals
• Quantum Spin Hall Effect in Graphene
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Van der Waals Density Functional for General Geometries
• Van der Waals density functionals applied to solids
• Topological Insulators with Inversion Symmetry
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• New directions in the pursuit of Majorana fermions in solid state systems
• Quantum Spin Hall Effect in Silicene
• Large-gap quantum spin Hall insulators in tin films
• Van der Waals bonding in layered compounds from advanced first-principles calculations
• Intrinsic and Rashba Spin-orbit Interactions in Graphene Sheets
• Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
• Spin-orbit gap of graphene: First-principles calculations
• Evidence for Helical Edge Modes in Inverted InAs/GaSb Quantum Wells
• Model Hamiltonian for Topological Insulators
• Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
• Angle Dependent Van Hove Singularities in Slightly Twisted Graphene Bilayer
• Interlayer binding energy of graphite -- A direct experimental determination
• Prediction of weak topological insulators in layered semiconductors
• First-principles calculation of topological invariants Z2 within the FP-LAPW formalism

Cited by in corpus (64)

• Colloquium: Topological Band Theory
• Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
• Topological Phases in Two-Dimensional Materials: A Brief Review
• Electric Field Induced Topological Phase Transition in Two-Dimensional Few-layer Black Phosphorus
• Large-Gap Two-Dimensional Topological Insulator in Oxygen Functionalized MXene
• Material design with the van der Waals stacking of bismuth-halide chains realizing a higher-order topological insulator
• Two-Dimensional Oxide Topological Insulator With Iron-Pnictide Superconductor LiFeAs Structure
• Experimental evidence of large-gap two-dimensional topological insulator on the surface of ZrTe5
• Quantum Spin Hall Effect and Topological Phase Transition in Two-Dimensional Square Transition Metal Dichalcogenides
• A Novel Quasi-One-Dimensional Topological Insulator in Bismuth Iodide $\beta$-Bi${}_4$I${}_4$
• New Family of Quantum Spin Hall Insulators in Two-dimensional Transition-Metal Halide with Large Nontrivial Band Gaps
• Large-Gap Quantum Spin Hall States in Stanene Grown on Substrate
• Room-temperature quantum spin Hall edge state in a higher-order topological insulator Bi${}_4$Br${}_4$
• Theoretical Prediction of Two-Dimensional Functionalized MXene Nitrides as Topological Insulators
• Weak Topological Insulators and Composite Weyl Semimetals: $\beta$-Bi${}_4$X${}_4$ (X=Br, I)
• Quantum Spin Hall Effect in 2D Transition Metal Dichalcogenide Haeckelites
• Emergence of topological bands on the surface of ZrSnTe crystal
• van der Waals Heterostructures of Germanene, Stanene and Silicene with Hexagonal Boron Nitride and Their Topological Domain Walls
• Two-Dimensional Inversion Asymmetric Topological Insulators in Functionalized III-Bi Bilayers
• Discovery of a two-dimensional topological insulator in SiTe
• Purely rotational symmetry-protected topological crystalline insulator $\alpha$-Bi4Br4
• Unconventional topological phase transition in two-dimensional systems with space-time inversion symmetry
• Topological edge states in single- and multi-layer Bi${}_4$Br${}_4$
• The influence of lattice termination on the edge states of the quantum spin Hall insulator monolayer $1T^{\prime }$-WTe${}_2$
• Quantum Spin Hall Effect in Ta${}_2$M${}_3$Te${}_5$ (M = Pd, Ni)
• Electrical transport in nano-thick ZrTe${}_5$ sheets: from three to two dimensions
• Ferroelectric metals in 1T/1T'-phase transition metal dichalcogenide MTe2 bilayers (M = Pt, Pd, and Ni)
• Topological electronic structure and spin texture of quasi-one-dimensional higher-order topological insulator Bi4Br4
• Coupling effect of topological states and Chern insulators in two-dimensional triangular lattices
• Transport response of topological hinge modes in $\alpha$-Bi${}_4$Br${}_4$
• Two-particle Berry phase mechanism for Dirac and Majorana Kramers pairs of corner modes
• Transforming common III-V and II-VI semiconductor compounds into topological heterostructures: The case of CdTe/InSb superlattices
• Doubled Quantum Spin Hall Effect with High-Spin Chern Number in $\alpha$-Antimonene and $\alpha$-Bismuthene
• Engineering quantum spin Hall insulators by strained-layer heterostructures
• Classification of accidental band crossings and emergent semimetals in two-dimensional noncentrosymmetric systems
• Epitaxial Growth of Quasi-One-Dimensional Bismuth-Halide Chains with Topological Non-Trivial Edge States
• Converting normal insulators into topological insulators via tuning orbital levels
• Towards Layer-Selective Quantum Spin Hall Channels in Weak Topological Insulator Bi4Br2I2
• New Quantum Spin Hall Insulator in Two-dimensional MoS${}_2$ with Periodically Distributed Pores
• Gallium Bismuth Halides GaBi-X2 (X= I, Br, Cl) Monolayers with Distorted Hexagonal Framework: Novel Room-Temperature Quantum Spin Hall Insulators
• Facet Dependent Topological Phase Transition in Bi4Br4
• From Atomic Semimetal to Topological Nontrivial Insulator
• Feature-energy duality of topological boundary states in multilayer quantum spin Hall insulator
• Optical bulk-boundary dichotomy in a quantum spin Hall insulator
• Coalescence of multiple topological orders in quasi-one-dimensional bismuth halide chains
• Experimental observations indicating the topological nature of the edge states on HfTe5
• Quantum transport evidence of the boundary states and Lifshitz transition in Bi${}_4$Br${}_4$
• An efficient method for hybrid density functional calculation with spin-orbit coupling
• A robust weak topological insulator in a bismuth halide Bi4Br2I2
• A new kind of 2D topological insulators BiCN with a giant gap and its substrate effects
• Topological phase in non-centrosymmetric material NaSnBi
• Topological Phase Transition in Quasi-One-Dimensional Bismuth Iodide Bi4I4
• Mass Acquisition of Dirac Fermions in Bi4I4 by Spontaneous Symmetry Breaking
• `Holographic' treatment of surface disorder on a topological insulator
• Quantum spin Hall effect in III-V semiconductors at elevated temperatures: advancing topological electronics
• Piezoelectric quantum spin Hall insulator VCClBr monolayer with pure out-of-plane piezoelectric response
• Realization of Kane-Mele Model in $X{\mathbf{N}}_4$-Embedded Graphene ($X$=Pt, Ir, Rh, Os)
• Spin-valley-coupled quantum spin Hall insulator with topological Rashba-splitting edge states in Janus monolayer $\mathrm{CS}{\mathrm{b}}_{1.5}\mathrm{B}{\mathrm{i}}_{1.5}$
• Shear-resistant topology in quasi one-dimensional van der Waals material Bi${}_4$Br${}_4$
• Signature of quantum phase transition manifested in quantum fidelity at finite temperature
• Quantum Coherent Transport of 1D ballistic states in second order topological insulator Bi${}_4$Br${}_4$
• Field manipulation of Weyl modes in an ideal Dirac semimetal
• Phonons Drive the Topological Phase Transition in Quasi-One-Dimensional Bi${}_4$I${}_4$
• Robust large-gap topological insulator phase in transition-metal chalcogenide ZrTe${}_4$Se