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Title: Aspects of symmetry and topology in the charge density wave phase of 1T–TiSe2
Authors: Huang, Shin-Ming
Xu, Su-Yang
Singh, Bahadur
Hsu, Ming-Chien
Hsu, Chuang-Han 
Su, Chenliang
Bansil, Arun
Lin, Hsin
Keywords: Charge density wave
Topological insulator
Transition metal dichalcogenides
Issue Date: 1-Aug-2021
Publisher: IOP Publishing Ltd
Citation: Huang, Shin-Ming, Xu, Su-Yang, Singh, Bahadur, Hsu, Ming-Chien, Hsu, Chuang-Han, Su, Chenliang, Bansil, Arun, Lin, Hsin (2021-08-01). Aspects of symmetry and topology in the charge density wave phase of 1T–TiSe2. New Journal of Physics 23 (8) : 83037. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: The charge density wave (CDW) in 1T–TiSe2 harbors a nontrivial symmetry configuration. It is important to understand this underlying symmetry both for gaining a handle on the mechanism of CDW formation and for probing the CDW experimentally. Here, based on first-principles computations within the framework of the density functional theory, we unravel the connection between the symmetries of the normal and CDW states and the electronic structure of 1T–TiSe2. Our analysis highlights the key role of irreducible representations of the electronic states and the occurrence of band gaps in the system in driving the CDW. By showing how symmetry-related topology can be obtained directly from the electronic structure, our study provides a practical pathway in search of topological CDW insulators. © 2021 The Author(s).
Source Title: New Journal of Physics
ISSN: 1367-2630
DOI: 10.1088/1367-2630/ac1bf4
Rights: Attribution 4.0 International
Appears in Collections:Staff Publications

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