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Superconductivity in quasicrystals poses a new challenge in condensed matter physics. We measuredtheresistanceandacmagneticsusceptibilityofaTa1.6Tedodecagonalquasicrystal, which is superconducting below Tc ∼ 1 K. We show that the upper critical field increases linearlywithalargeslopeof−4.4T/Kwithdecreasingtemperaturedownto0.04K,withno tendencytoleveloff.Theextrapolatedzero-temperaturecriticalfieldexceedsthePaulilimit by a factor of 2.3. We also observed flux-flow resistance with thermally activated behavior and an irreversibility field that is distinct from the upper critical field. We discuss these peculiarities in terms of the nonuniform superconducting gap and spin–orbit interaction in quasicrystal structures.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: superconductivity, quasicrystal, upper critical field

刊行年月日: 2024-07-20

出版者: Springer Science and Business Media LLC

掲載誌:

• npj Quantum Materials (ISSN: 23974648) vol. 9 issue. 1 56

研究助成金:

• MEXT | Japan Society for the Promotion of Science JP22H04485
• MEXT | Japan Society for the Promotion of Science JP22K03537
• MEXT | Japan Society for the Promotion of Science JP23K04355
• Tokuyama Science Foundation
• MEXT | JST | Core Research for Evolutional Science and Technology JPMJCR22O3
• MEXT | Japan Society for the Promotion of Science JP19H05821

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41535-024-00669-9

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更新時刻: 2024-07-22 12:30:30 +0900

MDRでの公開時刻: 2024-07-22 12:30:30 +0900