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

Abstract

In this work, we report the signature of a strain-controlled topological phase transition in the electronic structure of a quasione-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 ($$10\overline{1}$$) 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.

Authors:

Hyun, Jounghoon  ^[1];

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• Search DOE PAGES for ORCID "0000-0003-2254-4984"

Jeong, Min Yong ^[1]; Jung, Myung-Chul  ^[1];

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• Search DOE PAGES for ORCID "0000-0003-4133-7710"

Lee, Yeonghoon ^[1]; Kim, Younsik ^[2]; Jung, Saegyeol ^[2]; Seok, Byeongjun ^[2]; Song, Junseong  ^[3];

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• Search DOE PAGES for ORCID "0000-0002-8460-9934"

Lim, Chan-young  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-7354-6600"

Cha, Jaehun ^[1]; Lee, Gyubin ^[1]; An, Yeojin ^[1]; Hashimoto, Makoto  ^[4];

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• Search DOE PAGES for ORCID "0000-0003-1689-8997"

Lu, Donghui  ^[4];

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• Search DOE PAGES for ORCID "0000-0002-9708-0443"

Denlinger, Jonathan D. ^[5]; Kim, Sung Wng ^[6]; Kim, Changyoung ^[2]; Han, Myung Joon ^[1]; Kim, Sunghun  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-9320-7243"

Kim, Yeongkwan ^[1]

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+ Show Author Affiliations

1. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
2. Institute for Basic Science, Seoul (Korea, Republic of); Seoul National Univ. (Korea, Republic of)
3. Sungkyunkwan Univ., Suwon (Republic of Korea)
4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
6. Sungkyunkwan Univ., Suwon (Republic of Korea); Institute for Basic Science, Seoul (Korea, Republic of)

Publication Date:

Thu Mar 31 00:00:00 EDT 2022

Research Org.:

SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Sponsoring Org.:

National Research Foundation of Korea (NRF); Ministry of Science and ICT; USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:

1877889

Grant/Contract Number:  

AC02-76SF00515; AC02-05CH11231; 2020R1A4A2002828; 2020K1A3A7A09080366; 2021R1A2C1013119; 2015M3D1A1070672; 2021R1A2C1009303; 2018R1D1A1B07050869; 2019R1A6A1A10073887; IBS-R009-G2

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review. B

Additional Journal Information:

Journal Volume: 105; Journal Issue: 11; Journal ID: ISSN 2469-9950

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY