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Strain-controlled evolution of electronic structure indicating topological phase transition in the quasi-one-dimensional superconductor TaSe3

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Title
Strain-controlled evolution of electronic structure indicating topological phase transition in the quasi-one-dimensional superconductor TaSe3
Author(s)
Hyun, Jounghoon; Jeong, Min Yong; Jung, Myung-Chul; Lee, Yeonghoon; Younsik Kim; Saegyeol Jung; Byeongjun Seok; Song, Junseong; Lim, Chan-Young; Cha, Jaehun; Lee, Gyubin; An, Yeojin; Hashimoto, Makoto; Lu, Donghui; Denlinger, Jonathan D.; Sung Wng Kim; Changyoung Kim; Han, Myung Joon; Kim, Sunghun; Kim, Yeongkwan
Publication Date
2022-03
Journal
Physical Review B, v.105, no.11
Publisher
American Physical Society
Abstract
© 2022 American Physical Society.We report the signature of a strain-controlled topological phase transition in the electronic structure of a quasi-one-dimensional superconductor TaSe3. Using angle-resolved photoemission spectroscopy and first-principles calculation, TaSe3 is identified to be in a weak topological insulator phase which has topologically nontrivial surface states only at the allowed planes. Under uniaxial tensile strain, a Dirac point and the topological surface state emerge on the originally forbidden (101¯) plane, which demonstrates the transition to a strong topological insulator phase. Our results accomplish the experimental realization of possible topological insulating phases in TaSe3 and highlight the possibility of coupling the superconductivity with two distinct topological insulating phases in a controllable manner.
URI
https://pr.ibs.re.kr/handle/8788114/11457
DOI
10.1103/PhysRevB.105.115143
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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