Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session B28: Fe-Based Superconductors: Te-doped and S-doped FeSe
11:30 AM–1:06 PM,
Monday, March 6, 2023
Room: Room 220
Sponsoring
Unit:
DMP
Chair: Gang Qiu, University of California, Los Angeles
Abstract: B28.00005 : Probing time-reversal symmetry breaking in FeSe1-xTex superconductors by muon spin relaxation
12:18 PM–12:30 PM
Presenter:
Masaki Roppongi
(University of Tokyo)
Authors:
Masaki Roppongi
(University of Tokyo)
Koki Ogawa
(University of Tokyo)
Yipeng Cai
(University of British Columbia)
Guoqiang Zhao
(Institute of Physics Chinese Academy of Sciences)
Mohamed Oudah
(University of British Columbia)
Supeng Liu
(University of Tokyo)
Marta-Villa De Toro Sanchez
(University of British Columbia, The University of Edinburgh)
Cyrus Young
(University of British Columbia)
Jinsong Zhang
(Institute of Physics Chinese Academy of Sciences)
Igor Markovic
(University of British Columbia)
Takao Watanabe
(Hirosaki University)
Takenori Fujii
(University of Tokyo)
Kohei Matsuura
(University of Tokyo)
Kota Ishihara
(University of Tokyo)
Kenichiro Hashimoto
(University of Tokyo)
Douglas A Bonn
(University of British Columbia)
Kenji M Kojima
(University of British Columbia)
Yasutomo J Uemura
(Columbia Univ)
Takasada Shibauchi
(University of Tokyo)
Here, we report the results of zero-field (ZF) and transverse-field (TF) μSR measurements in single crystals of FeSe1-xTex both inside and outside the nematic phase. We will discuss the time-reversal symmetry breaking from the ZF results and the gap structure in the superconducting state through the temperature dependence of penetration depth from the TF results. From these results, we construct a combined superconducting phase diagram of FeSe1-xSx and FeSe1-xTex with QCPs, which gives an important input for understanding the relationship between the superconducting state, nematicity, and nontrivial topology.
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