論文

2017年9月

Spin-singlet superconductivity in the doped topological crystalline insulator Sn0.96In0.04Te

PHYSICAL REVIEW B
  • Satoki Maeda
  • ,
  • Ryohei Hirose
  • ,
  • Kazuaki Matano
  • ,
  • Mario Novak
  • ,
  • Yoichi Ando
  • ,
  • Guo-qing Zheng

96
10
開始ページ
359
終了ページ
384
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.96.104502
出版者・発行元
AMER PHYSICAL SOC

The In-doped topological crystalline insulator Sn1-x In-x Te is a candidate for a topological superconductor, where a pseudo-spin-triplet state has been proposed. To clarify the spin symmetry of Sn1-x In-x Te, we perform Te-125-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 (T-c) in polycrystalline Sn0.96In0.04Te, which indicates a fully opened superconducting gap. In this sample, the spin susceptibility measured by the spin Knight shift (K-s) at an external magnetic field of H-mu 0(0) = 0.0872 T decreases below T-c, and K-s(T = 0)/K-s(T = T-c) 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.

Web of Science ® 被引用回数 : 6

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.96.104502
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000409253700007&DestApp=WOS_CPL