Clarification of charge-density wave gap symmetry and topology in bulk 1<i>T</i>-TiSe<sub>2</sub>

ORAL

Abstract


We examine the symmetry of the charge density wave (CDW) phase of 1T-TiSe2 and answer the connection of electronic structures between the normal and the CDW states. Especially, we unravel the consequential irreducible representations (IRs) of electronic states and, more ahead, those of gap functions among bands when the CDW occurs. Normally symmetry-related topology will be achieved directly, so we assert that the theory is valuable and practical for the search of topological CDW insulators.

*SMH is supported by the Ministry of Science and Tech- nology (MoST) in Taiwan under grant No. 105-2112-M- 110-014-MY3 and also by the NCTS of Taiwan.

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Presenters

  • Shin-Ming Huang

    • Physics, National Sun Yat-sen University
    • National University of Singapore
    • Department of Physics, National Sun Yat-sen University

Authors

  • Shin-Ming Huang

    • Physics, National Sun Yat-sen University
    • National University of Singapore
    • Department of Physics, National Sun Yat-sen University

  • Suyang Xu

    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology
    • MIT
    • Physics, MIT
    • Department of Physics, Massachusetts Institute of Technology, Cambridge

  • Bahadur Singh

    • SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D
    • Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA /SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for
    • Department of Physics, National University of Singapore
    • SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science \& Technology, Engineering Technology Research Center for 2
    • Department of Physics, Northeastern University
    • Shenzhen University, Shenzhen, China
    • College of Optoelectronic Engineering, Shenzhen University

  • Ming-Chien Hsu

    • Physics, National Sun Yat-sen University
    • Department of Physics, National Sun Yat-sen University

  • Chuang-Han Hsu

    • Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore
    • National University of Singapore
    • Physics, National University of Singapore

  • Chenliang Su

    • SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D
    • SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science \& Technology, Engineering Technology Research Center for 2
    • Shenzhen University, Shenzhen, China
    • SZU-NUS Collaborative Center and International Collaborative, Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2

  • Arun Bansil

    • Department of Physics, Northeastern University
    • Northeastern
    • Physics, Northeastern University, Boston, Massachusetts 02115, USA
    • Northeastern University
    • Northeastern University, Boston (MA), USA
    • Physics, Northeastern U.
    • Department of Physics, Northwestern University
    • Physics, Northeastern University, Boston, MA, USA

  • Hsin Lin

    • Academia Sinica
    • Institute of Physics, Academia Sinica
    • Physics, Academia Sinica, Taipei 11529, Taiwan
    • Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
    • Physics, Academia Sinica
    • Department of Physics, National University of Singapore
    • National University of Singapore
    • Academia Sinica, Taipei, Taiwan