Superconducting properties of (Pb0.05Sn0.95)Te doped with indium under conditions of hydrostatic compression
- Authors: Mikhailin N.Y.1, Parfeniev R.V.1, Chernyaev A.V.1, Shamshur D.V.1, Andrianov G.O.1
-
Affiliations:
- Ioffe Institute
- Issue: Vol 51, No 8 (2017)
- Pages: 1017-1020
- Section: XV International Conference “Thermoelectrics and Their Applications—2016”, St. Petersburg, November 15–16, 2016
- URL: https://journals.rcsi.science/1063-7826/article/view/200883
- DOI: https://doi.org/10.1134/S106378261708022X
- ID: 200883
Cite item
Abstract
The superconducting properties of Pb0.05Sn0.95Te semiconductor alloy doped with 5 at % of In are investigated at a hydrostatic pressure of P < 7 kbar. At increasing pressure P > 1.35 kbar and T ≥ 1.3 K, the resistivity step to ρ = 0 in the temperature and magnetic-field dependences ρ(T) and ρ(H), which corresponds to the transition to the superconducting state, disappears. The experimental results are indicative of a decrease in the density of states at the Fermi level with increasing pressure, which can be interpreted as an indium-level shift deep into the valence band. The obtained data refine and supplement the results of studies devoted to investigation of the baric dependences of the critical parameters of the superconducting transition in (PbzSn1–z)0.95In0.05Te with varying lead content z.
About the authors
N. Yu. Mikhailin
Ioffe Institute
Email: chernyaevav@yandex.ru
Russian Federation, St. Petersburg, 194021
R. V. Parfeniev
Ioffe Institute
Email: chernyaevav@yandex.ru
Russian Federation, St. Petersburg, 194021
A. V. Chernyaev
Ioffe Institute
Author for correspondence.
Email: chernyaevav@yandex.ru
Russian Federation, St. Petersburg, 194021
D. V. Shamshur
Ioffe Institute
Email: chernyaevav@yandex.ru
Russian Federation, St. Petersburg, 194021
G. O. Andrianov
Ioffe Institute
Email: chernyaevav@yandex.ru
Russian Federation, St. Petersburg, 194021