Weak topological insulators induced by the interlayer coupling: A first-principles study of stacked Bi 2 TeI

Tang P, Yan B, Cao W, Wu SC, Felser C, Duan W (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Physical Review B - Condensed Matter and Materials Physics American Physical Society (APS)

Book Volume: 89

Article Number: 041409

Journal Issue: 4

DOI: 10.1103/PhysRevB.89.041409

Abstract

Based on first-principles calculations, we predict Bi2TeI, a stoichiometric compound that is 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 the BiTeI layer plane. These Dirac cones are relatively isotropic due to the strong interlayer 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. © 2014 American Physical Society.

Involved external institutions

Tsinghua University CN China (CN) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Tang, P., Yan, B., Cao, W., Wu, S.-C., Felser, C., & Duan, W. (2014). Weak topological insulators induced by the interlayer coupling: A first-principles study of stacked Bi 2 TeI. Physical Review B - Condensed Matter and Materials Physics, 89(4). https://doi.org/10.1103/PhysRevB.89.041409

MLA:

Tang, Peizhe, et al. "Weak topological insulators induced by the interlayer coupling: A first-principles study of stacked Bi 2 TeI." Physical Review B - Condensed Matter and Materials Physics 89.4 (2014).

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