Weak topological insulators induced by the inter-layer coupling: A first-principles study of stacked Bi2TeI

Abstract

Based on first-principles calculations, we predict Bi2TeI, a stoichiometric compound synthesized, to be a weak topological insulator (TI) in layered subvalent bismuth telluroiodides. Within a bulk energy gap of 80 meV, two Dirac-cone-like topological surface states exist on the side surface perpendicular to BiTeI layer plane. These Dirac cones are relatively isotropic due to the strong inter-layer coupling, distinguished from those of previously reported weak TI candidates. Moreover, with chemically stable cladding layers, the BiTeI-Bi2-BiTeI sandwiched structure is a robust quantum spin Hall system, which can be obtained by simply cleaving the bulk Bi2TeI.

arXiv comment4.5 pages, 4 figures

References in corpus (34)

• Topological Insulators
• Topological insulators and superconductors
• Two Dimensional Atomic Crystals
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Van der Waals Density Functional for General Geometries
• Maximally-localized generalized Wannier functions for composite energy bands
• Topological Insulators in Three Dimensions
• Van der Waals density functionals applied to solids
• Topological Insulators with Inversion Symmetry
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Topological invariants of time-reversal-invariant band structures
• First observation of Spin-Momentum Helical Locking in Bi2Se3 and Bi2Te3, demonstration of Topological-Order at 300K and a realization of topological-transport-regime
• Model Hamiltonian for Topological Insulators
• The space group classification of topological band insulators
• Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
• Helical Metal Inside a Topological Band Insulator
• Well-localized edge states in two-dimensional topological insulators: ultrathin Bi films
• Stable nontrivial Z2 topology in ultrathin Bi (111) films: a first-principles study
• Angle Dependent Van Hove Singularities in Slightly Twisted Graphene Bilayer
• Transition-Metal Pentatelluride ZrTe${}_5$ and HfTe${}_5$: a Paradigm for Large-gap Quantum Spin Hall Insulators
• The strong side of weak topological insulators
• Origin of giant bulk Rashba splitting: Application to BiTeI
• Stacked topological insulator built from bismuth-based graphene sheet analogues
• Ideal two-dimensional electron systems with a giant Rashba-type spin splitting in real materials: surfaces of bismuth tellurohalides
• Giant ambipolar Rashba effect in a semiconductor: BiTeI
• Ultra-thin Topological Insulator Bi2Se3 Nanoribbons Exfoliated by Atomic Force Microscopy
• Quantum transport and two-parameter scaling at the surface of a weak topological insulator
• Topologically protected quantum transport in locally exfoliated bismuth at room temperature
• Prediction of weak topological insulators in layered semiconductors
• Topological insulator in a Bi-Bi${}_2$Se${}_3$ infinitely adaptive superlattice phase
• Weak topological insulator with protected gapless helical states
• Half quantum spin Hall effect on the surface of weak topological insulators
• Perfectly conducting channel on the dark surface of weak topological insulators

Cited by in corpus (24)

• Colloquium: Topological Band Theory
• Catalogue of Topological Electronic Materials
• Functionalized Germanene as a Prototype of Large-Gap Two-Dimensional Topological Insulators
• Discovery of switchable weak topological insulator state in quasi-one-dimensional bismuth iodide
• A Novel Quasi-One-Dimensional Topological Insulator in Bismuth Iodide $\beta$-Bi${}_4$I${}_4$
• New Family of Robust 2D Topological Insulators in van der Waals Heterostructures
• Aperiodic Weak Topological Superconductors
• Observation and control of the weak topological insulator state in ZrTe5
• Weak Topological Insulators in PbTe/SnTe Superlattices
• Room-Temperature Topological Phase Transition in Quasi-One-Dimensional Material Bi${}_4$I${}_4$
• Experimental realization of two-dimensional weak topological insulators
• Layered Topological Crystalline Insulators
• Designer Topological Insulators in Superlattices
• Transport discovery of emerging robust helical surface states in $Z_2=0$ systems
• Space group constraints on weak indices in topological insulators
• Glide-symmetric topological crystalline insulator phase in a nonprimitive lattice
• A robust weak topological insulator in a bismuth halide Bi4Br2I2
• Quantum phase transitions of topological insulators without gap closing
• Delocalization of surface Dirac electrons in disordered weak topological insulators
• Effective model for massless Dirac electrons on a surface of weak topological insulators
• Chemical Gating of a Weak Topological Insulator: Bi14Rh3I9
• Magnetization-free quantum anomalous Hall effect in altermagnetic weak topological insulators
• Landau levels on a surface of weak topological insulators
• Weak topological insulators with step edges: Subband engineering and its effect on electron transport