Universität zu Köln

Maeda, Satoki, Hirose, Ryohei, Matano, Kazuaki, Novak, Mario, Ando, Yoichi ORCID: 0000-0002-3553-3355 and Zheng, Guo-qing (2017). Spin-singlet superconductivity in the doped topological crystalline insulator Sn0.96In0.04Te. Phys. Rev. B, 96 (10). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Maeda, Satoki UNSPECIFIED UNSPECIFIED UNSPECIFIED Hirose, Ryohei UNSPECIFIED UNSPECIFIED UNSPECIFIED Matano, Kazuaki UNSPECIFIED UNSPECIFIED UNSPECIFIED Novak, Mario UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED Zheng, Guo-qing UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-218006
DOI:	10.1103/PhysRevB.96.104502
Journal or Publication Title:	Phys. Rev. B
Volume:	96
Number:	10
Date:	2017
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ROTATION Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21800