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ID 55629
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Author
Maeda, Satoki Department of Physics, Okayama University
Hirose, Ryohei Department of Physics, Okayama University
Matano, Kazuaki Department of Physics, Okayama University
Novak, Mario Institute of Scientific and Industrial Research, Osaka University
Ando, Yoichi Physics Institute II, University of Cologne
Zheng, Guo-qing Department of Physics, Okayama University
Abstract
The In-doped topological crystalline insulator Sn1−x InxTe is a candidate for a topological superconductor, where a pseudo-spin-triplet state has been proposed. To clarify the spin symmetry of Sn1−x InxTe, we perform 125Te-nuclear magnetic resonance (NMR) measurements in polycrystalline samples with 0 x 0.15. The penetration depth calculated from the NMR line width is T independent below half the superconducting transition temperature (Tc) in polycrystalline Sn0.96In0.04Te, which indicates a fully opened superconducting gap. In this sample, the spin susceptibility measured by the spin Knight shift (Ks) at an external magnetic field of μ0H0 = 0.0872 T decreases below Tc, and Ks(T = 0)/Ks(T = Tc) reaches 0.36 ± 0.10, which is far below the limiting value 2/3 expected for a spin-triplet state for a cubic crystal structure. Our result indicates that polycrystalline Sn0.96In0.04Te is a spin-singlet superconductor.
Note
This is an article published by American Physical Society
Published Date
2017-09
Publication Title
Physical Review B
Volume
volume96
Issue
issue10
Publisher
American Physical Society
Start Page
104502
ISSN
2469-9950
NCID
AA11187113
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
Copyright Holders
American Physical Society
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publisher
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.1103/PhysRevB.96.104502