| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Superconducting Properties and Absence of Time Reversal Symmetry Breaking in the Noncentrosymmetric Superconducting Compounds Ta$_{x}$Re$_{1-x}$($0.1\leq x \leq0.25$) |
| Chun-Qiang Xu1, Yi Liu2, Wei Zhou3, Jia-Jia Feng1, Sen-Wei Liu1, Yu-Xing Zhou4, Hao-Bo Wang3, Zhi-Da Han3, Bin Qian3, Xue-Fan Jiang3, Xiao-Feng Xu2,3, Wei Ye1, Zhi-Xiang Shi1*, Xiang-Lin Ke5*, and Pabitra-Kumar Biswas6* |
1 School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China
2Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, China
3School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, China
4Department of Physics, Zhejiang University, Hangzhou 310007, China
5Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-2320, USA
6ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom
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| Cite this article: |
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Chun-Qiang Xu, Yi Liu, Wei Zhou et al 2021 Chin. Phys. Lett. 38 017401 |
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Abstract Unconventional superconductivity, in particular, in noncentrosymmetric systems, has been a long-sought topic in condensed matter physics. Recently, Re-based superconductors have attracted great attention owing to the potential time-reversal symmetry breaking in their superconducting states. We report the superconducting properties of noncentrosymmetric compounds Ta$_{x}$Re$_{1-x}$ with $0.1\leq x \leq0.25$, and find that the superconducting transition temperature reaches a maximum of $\sim$8 K at the optimal level $x=0.15$. Nevertheless, muon-spin rotation and relaxation measurements reveal no time-reversal symmetry breaking existing in its superconducting state, which is in sharp contrast to both centrosymmetric Re metal and many other noncentrosymmetric Re-based superconductors.
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Received: 28 October 2020
Published: 06 January 2021
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| Fund: Supported by the National Key R$\&$D Program of China (Grant No. 2018YFA0704300), the National Natural Science Foundation of China (Grant Nos. U1732162, 11974061, 11704047, U1832147 and 11674054), and the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB25000000). |
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