First-principles prediction of a new family of layered topological insulators
arXiv:1907.08359 · doi:10.1002/qute.201900033
Abstract
Dozens of layered VIVVI (V=P, As, Sb, Bi, IV=Si, Ge, Sn, Pb, VI=S, Se, Te) materials are investigated, several of which have been successfully synthesized in experiment. Among them, we predict nine strong topological insulators (TIs), two strong topological metals (TMs) and nearly twenty trivial insulators at their equilibrium structures. The TIs are in the (1;111) topological class, with energy gaps ranging from 0.04 to 0.2 eV. The strong TMs and the trivial insulators belong to the (1;111) and (0;000) topological classes, respectively. Small compressive strains easily turn some of the trivial insulators into strong TIs. This study enriches not only the family of topological materials but also the family of van der Waals layered materials, providing promising candidates for the future spintronic devices.
arXiv comment13 pages, 4 figures
References in corpus (23)
- Topological Insulators
- Topological insulators and superconductors
- Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
- Topological Insulators in Three Dimensions
- Topological Insulators with Inversion Symmetry
- Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
- Topological invariants of time-reversal-invariant band structures
- Giant Tunneling Magnetoresistance in Spin-Filter van der Waals Heterostructures
- Three dimensional topological invariants for time reversal invariant Hamiltonians and the three dimensional quantum spin Hall effect
- Probing magnetism in 2D van der Waals crystalline insulators via electron tunneling
- Surface States of the Topological Insulator Bi_{1-x}Sb_x
- Band structure engineering in (Bi1-xSbx)2Te3 ternary topological insulators
- Optimizing the Bi_(2-x)Sb_(x)Te_(3-y)Se_(y) solid solutions to approach the intrinsic topological insulator regime
- Topological Insulators in Random Lattices
- Single-Dirac-Cone topological surface states in TlBiSe2 class of Topological Insulators
- Fermi level tuning and a large activation gap achieved in the topological insulator Bi_{2}Te_{2}Se by Sn doping
- Experimental verification of PbBiTe as a 3D topological insulator
- First-principles calculation of topological invariants Z2 within the FP-LAPW formalism
- New class of 3D topological insulator in double perovskite
- Designing 3D topological insulators by 2D-Xene (X = Ge, Sn) sheet functionalization in the GaGeTe-type structures
- Three-dimensional topological insulators: A review on host materials
- A strong-topological-metal material with multiple Dirac cones
- BaSn: A new, wide-gap, strong topological insulator