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Nodeless superconducting gap in the candidate topological superconductor Sn$_{1-x}$In$_x$Te for x = 0.7

Authors :
Smylie, M. P.
Kobayashi, Kaya
Takahashi, T.
Chaparro, C.
Snezhko, A.
Kwok, W. -K.
Welp, U.
Publication Year :
2019
Publisher :
arXiv, 2019.

Abstract

High-pressure synthesis techniques have allowed for the growth of Sn$_{1-x}$In$_x$Te samples beyond the ambient In-saturation limit of $x$ = 0.5 (T$_c \sim$ 4.5 K). In this study, we present measurements of the temperature dependence of the London penetration depth $\Delta\lambda(T)$ in this superconducting doped topological insulator for $x$ = 0.7, where T$_{c,onset}\approx 5$ K. The results indicate fully gapped BCS-like behavior, ruling out odd-parity $A_{2u}$ pairing; however, odd-parity $A_{1u}$ pairing is still possible. Critical field values measured below 1 K and other superconducting parameters are also presented.<br />Comment: 5 pages, 6 figures

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....c7581ac05e93d2ea6d5e618325797e19
Full Text :
https://doi.org/10.48550/arxiv.1910.06413