Nodeless superconducting gap in the candidate topological superconductor Sn1-x Inx Te for x=0.7

M. P. Smylie, Kaya Kobayashi, T. Takahashi, C. Chaparro, A. Snezhko, W. K. Kwok, U. Welp

Research output: Contribution to journalArticlepeer-review

Abstract

High-pressure synthesis techniques have allowed for the growth of Sn1-xInxTe samples beyond the ambient In-saturation limit of x=0.5 (Tc∼4.5 K). In this study we present measurements of the temperature dependence of the London penetration depth Δλ(T) in this superconducting doped topological insulator for x=0.7, where Tc,onset≈5 K. The results indicate fully gapped BCS-like behavior, ruling out odd-parity A2u pairing; however, odd-parity A1u pairing is still possible. Critical field values measured below 1 K and other superconducting parameters are also presented.

Original languageEnglish
Article number094513
JournalPhysical Review B
Volume101
Issue number9
DOIs
Publication statusPublished - Mar 1 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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