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Watanabe Y, Arima H, Yamashita A, Miura A, Moriyoshi C, Goto Y, Lee CH, Higashinaka R, Usui H, Kawaguchi S, Hoshi K, Mizuguchi Y. Low-Temperature Chiral Crystal Structure and Superconductivity in (Pt 0.2Ir 0.8) 3Zr 5. J Am Chem Soc 2024; 146:773-781. [PMID: 38148506 DOI: 10.1021/jacs.3c10797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
We report the observation of superconductivity in (Pt0.2Ir0.8)3Zr5 with a chiral space group (P6122) at low temperatures. The bulk nature of the superconductivity at a transition temperature of 2.2 K was confirmed using specific heat measurements. We revealed that (Pt0.2Ir0.8)3Zr5 obeys the weak-coupling Bardeen-Cooper-Schrieffer model, and the dominant mechanism in the upper critical field is the orbital pair-breaking limit rather than the Pauli-Clogston limit. This indicates that the antisymmetric spin-orbit coupling caused by the chiral crystal structure does not significantly affect the superconductivity of (Pt0.2Ir0.8)3Zr5.
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Affiliation(s)
- Yuto Watanabe
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Hiroto Arima
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Aichi Yamashita
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Akira Miura
- Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-0813, Japan
| | - Chikako Moriyoshi
- Graduate School of Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - Yosuke Goto
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
| | - Chul-Ho Lee
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
| | - Ryuji Higashinaka
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Hidetomo Usui
- Department of Applied Physics, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Shogo Kawaguchi
- Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Sayo-gun, Hyogo 679-5198, Japan
| | - Kazuhisa Hoshi
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Yoshikazu Mizuguchi
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
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