ID | 69377 |
フルテキストURL | |
著者 |
Feng, X. Y.
Institute of Physics, Chinese Academy of Sciences, and BeijingNational Laboratory for CondensedMatter Physics
Zhao, Z.
Institute of Physics, Chinese Academy of Sciences, and BeijingNational Laboratory for CondensedMatter Physics
Luo, J.
Institute of Physics, Chinese Academy of Sciences, and BeijingNational Laboratory for CondensedMatter Physics
Zhou, Y. Z.
Institute of Physics, Chinese Academy of Sciences, and BeijingNational Laboratory for CondensedMatter Physics
Yang, J.
Institute of Physics, Chinese Academy of Sciences, and BeijingNational Laboratory for CondensedMatter Physics
Fang, A. F.
Yang, H. T.
Institute of Physics, Chinese Academy of Sciences, and BeijingNational Laboratory for CondensedMatter Physics
Gao, H.-J.
Institute of Physics, Chinese Academy of Sciences, and BeijingNational Laboratory for CondensedMatter Physics
Zhou, R.
Institute of Physics, Chinese Academy of Sciences, and BeijingNational Laboratory for CondensedMatter Physics
Zheng, Guo-qing
Department of Physics, Okayama University
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抄録 | The discovery of the kagome metal CsV3Sb5 has generated significant interest in its complex physical properties, particularly its superconducting behavior under different pressures, though its nature remains debated. Here, we performed low-temperature, high-pressure 121/123Sb nuclear quadrupole resonance (NQR) measurements to explore the superconducting pairing symmetry in CsV3Sb5. At ambient pressure, we found that the spin-lattice relaxation rate 1/T1 exhibits a kink at T ~ 0.4 Tc within the superconducting state and follows a T3 variation as temperature further decreases. This suggests the presence of two superconducting gaps with line nodes in the smaller one. As pressure increases beyond Pc ~ 1.85 GPa, where the charge-density wave phase is completely suppressed, 1/T1 shows no Hebel-Slichter peak just below Tc, and decreases rapidly, even faster than T5, indicating that the gap is fully opened for pressures above Pc. In this high pressure region, the angular dependence of the in-plane upper critical magnetic field Hc2 breaks the C6 rotational symmetry. We propose the s + id pairing at P > Pc which explains both the 1/T1 and Hc2 behaviors. Our findings indicate that CsV3Sb5 is an unconventional superconductor and its superconducting state is even more exotic at high pressures.
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発行日 | 2025-04-17
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出版物タイトル |
Nature Communications
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巻 | 16巻
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号 | 1号
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出版者 | Springer Science and Business Media LLC
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開始ページ | 3643
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ISSN | 2041-1723
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資料タイプ |
学術雑誌論文
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言語 |
英語
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OAI-PMH Set |
岡山大学
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著作権者 | © The Author(s) 2025
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論文のバージョン | publisher
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PubMed ID | |
DOI | |
Web of Science KeyUT | |
関連URL | isVersionOf https://doi.org/10.1038/s41467-025-58941-w
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ライセンス | http://creativecommons.org/licenses/by/4.0/
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Citation | Feng, X.Y., Zhao, Z., Luo, J. et al. Fully-gapped superconductivity with rotational symmetry breaking in pressurized kagome metal CsV3Sb5. Nat Commun 16, 3643 (2025). https://doi.org/10.1038/s41467-025-58941-w
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