Two-band superconductivity of Sn1–xInxTe crystals with Tc = 3.6–3.8 K

The Andreev reflection spectra of high-quality superconducting Sn 1– x In x Te crystals with critical temperature T c = 3.6–3.8 K were examined. The two-band nature of the superconducting state of this compound was established. The energy gaps have s-symmetry and were measured to be 2Δ 1 / kT c = 3....

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Bibliographic Details
Published in:Physics of the solid state 2017-10, Vol.59 (10), p.1918-1925
Main Authors: Gorina, Yu. I., Golubkov, M. V., Osina, T. I., Rodin, V. V., Sentyurina, N. N., Chernook, S. G., Stepanov, V. A.
Format: Article
Language:English
Subjects:
Physics
Physics and Astronomy
Solid State Physics
Superconductivity
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Summary:The Andreev reflection spectra of high-quality superconducting Sn 1– x In x Te crystals with critical temperature T c = 3.6–3.8 K were examined. The two-band nature of the superconducting state of this compound was established. The energy gaps have s-symmetry and were measured to be 2Δ 1 / kT c = 3.5 ± 0.9 and 2Δ 2 / kT c = 7 ± 1. Neither of the contacts with a resistance of 1.5–23 Ω revealed a peak at zero voltage typical of the topological superconducting state.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783417100171