Full superconducting gap in the candidate topological superconductor In1-x Pbx Te for x=0.2

M. P. Smylie, Kaya Kobayashi, J. Z. Dans, H. Hebbeker, R. Chapai, W. K. Kwok, U. Welp

Research output: Contribution to journalArticlepeer-review

Abstract

High-pressure synthesis techniques have allowed for the growth of samples on the indium-rich side of (Pb,In)Te, which have increased superconducting transition temperatures compared to lead-rich compounds. In this paper we present measurements of the temperature dependence of the London penetration depth Δλ(T) in the compound In0.8Pb0.2Te, which shows a bulk Tc,onset of ∼4.75 K. The results indicate fully gapped BCS-like behavior, ruling out odd-parity topologically nontrivial 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 number054503
JournalPhysical Review B
Volume106
Issue number5
DOIs
Publication statusPublished - Aug 1 2022

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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