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Investigation of Superconducting Gap of High-Entropy Telluride AgInSnPbBiTe5

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2024年12月24日

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  • Asato Seshita,
  • Hirotaka Okabe,
  • Md. Riad Kasem,
  • Yuto Watanabe,
  • Jumpei G. Nakamura,
  • Shoichiro Nishimura,
  • Kensei Terashima,
  • Ryo Matsumoto,
  • Yoshihiko Takano,
  • Aichi Yamashita,
  • Masaki Fujita,
  • Yoshikazu Mizuguchi

摘要

We performed transverse-field muon spin relaxation/rotation (TF-μSR) on a high-entropy-type (HE-type) superconductor AgInSnPbBiTe5. The emergence of bulk superconducting states was confirmed from magnetic susceptibility, specific heat, and μSR. The superconducting gap 2Δ(0) estimated from μSR was clearly larger than that expected from conventional weak-coupling phonon-mediated model, suggesting the strong-coupling nature of superconductivity. In addition, a long penetration depth of 3.21(7) μm was obtained. The strong-coupling nature of superconductivity and the long penetration depth are similar to the trends observed in the other HE-type superconductors (HE alloys and transition-metal zirconides), which may be universal feature of HE-type superconductors.