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.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics