Prediction of the quantum spin Hall effect in monolayers of transition-metal carbides MC (M=Ti, Zr, Hf)

Zhou L, Shao B, Shi W, Sun Y, Felser C, Yan B, Frauenheim T (2016)

Publication Type: Journal article

Publication year: 2016

Journal

2D Materials IOP Science

Book Volume: 3

Article Number: 035022

Journal Issue: 3

DOI: 10.1088/2053-1583/3/3/035022

Abstract

Wereport the existence of the quantum spin Hall effect (QSHE) in monolayers of transition-metal carbidesMC(M=Zr, Hf). Under ambient conditions, the ZrC monolayer exhibits QSHE with an energy gap of 54 meV, in which topological helical edge states exist. Enhanced dxy-dxy interaction induces band inversion, resulting in nontrivial topological features. By applying in-plane strain, the HfC monolayer can be tuned from a trivial insulator to a quantum spin Hall insulator with an energy gap of 170 meV, three times that of the ZrC monolayer. The strong stability of MC monolayers provides a new platform for QSHE and spintronic applications.

Involved external institutions

Universität Bremen DE Germany (DE) 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:

Zhou, L., Shao, B., Shi, W., Sun, Y., Felser, C., Yan, B., & Frauenheim, T. (2016). Prediction of the quantum spin Hall effect in monolayers of transition-metal carbides MC (M=Ti, Zr, Hf). 2D Materials, 3(3). https://doi.org/10.1088/2053-1583/3/3/035022

MLA:

Zhou, Liujiang, et al. "Prediction of the quantum spin Hall effect in monolayers of transition-metal carbides MC (M=Ti, Zr, Hf)." 2D Materials 3.3 (2016).

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