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XV International Conference ''Thermoelectrics and Their Applications-2016 St. Petersburg'', November 15-16, 2016
Superconducting properties of (Pb$_{0.05}$Sn$_{0.95}$)Te doped with indium under conditions of hydrostatic compression
N. Yu. Mikhailin, R. V. Parfen'ev, A. V. Chernyaev, D. V. Shamshur, G. O. Andrianov Ioffe Institute, St. Petersburg
Abstract:
The superconducting properties of Pb$_{0.05}$Sn$_{0.95}$Te 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 $T\ge$ 1.3 K, the resistivity step to $\rho$ = 0 in the temperature and magnetic-field dependences $\rho(T)$ and $\rho(H)$, 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
(Pb$_{z}$Sn$_{1-z}$)$_{0.95}$In$_{0.05}$Te with varying lead content $z$.
Received: 31.01.2017 Accepted: 08.02.2017
Citation:
N. Yu. Mikhailin, R. V. Parfen'ev, A. V. Chernyaev, D. V. Shamshur, G. O. Andrianov, “Superconducting properties of (Pb$_{0.05}$Sn$_{0.95}$)Te doped with indium under conditions of hydrostatic compression”, Fizika i Tekhnika Poluprovodnikov, 51:8 (2017), 1060–1063; Semiconductors, 51:8 (2017), 1017–1020
Linking options:
https://www.mathnet.ru/eng/phts6068 https://www.mathnet.ru/eng/phts/v51/i8/p1060
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