Investigation of superconducting gap of high-entropy telluride AgInSnPbBiTe5

We performed transverse-field muon spin relaxation/rotation (TF-{\mu}SR) on a high-entropy-type (HE-type) superconductor AgInSnPbBiTe5. The emergence of bulk superconducting states was confirmed from magnetic susceptibility, specific heat, and {\mu}SR. The superconducting gap 2{\Delta}(0) estimated...

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Bibliographic Details
Published in:arXiv.org 2024-10
Main Authors: Asato Seshita, Okabe, Hirotaka, Kasem, Riad, Watanabe, Yuto, Nakamura, Jumpei G, Nishimura, Shoichiro, Terashima, Kensei, Matsumoto, Ryo, Takano, Yoshihiko, Yamashita, Aichi, Fujita, Masaki, Mizuguchi, Yoshikazu
Format: Article
Language:English
Subjects:
Coupling
Entropy
Magnetic permeability
Muon spin relaxation
Muon spin rotation
Penetration depth
Superconductivity
Superconductors
Tellurides
Transition metal alloys
Transition metals
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Summary:We performed transverse-field muon spin relaxation/rotation (TF-{\mu}SR) on a high-entropy-type (HE-type) superconductor AgInSnPbBiTe5. The emergence of bulk superconducting states was confirmed from magnetic susceptibility, specific heat, and {\mu}SR. The superconducting gap 2{\Delta}(0) estimated from {\mu}SR 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) {\mu}m 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.
ISSN:2331-8422