Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session X02: Topological Materials -- New Materials I
8:00 AM–11:00 AM,
Friday, March 8, 2019
BCEC
Room: 107A
Sponsoring
Unit:
DMP
Chair: Lu Li, University of Michigan
Abstract: X02.00003 : Clarification of charge-density wave gap symmetry and topology in bulk 1T-TiSe2*
8:24 AM–8:36 AM
Presenter:
Shin-Ming Huang
(Physics, National Sun Yat-sen University)
Authors:
Shin-Ming Huang
(Physics, National Sun Yat-sen University)
Suyang Xu
(Department of Physics, Massachusetts Institute of Technology)
Bahadur Singh
(SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D)
Ming-Chien Hsu
(Physics, National Sun Yat-sen University)
Chuang-Han Hsu
(Centre for Advanced 2D Materials and Graphene Research Centre, 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)
Arun Bansil
(Department of Physics, Northeastern University)
Hsin Lin
(Institute of Physics, Academia Sinica)
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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