Superconducting properties of (Pb0.05Sn0.95)Te doped with indium under conditions of hydrostatic compression

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 ≥ 1.3 K, the resistivity step to ρ = 0 in the temperature and magnetic-field dependences ρ( T )...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2017-08, Vol.51 (8), p.1017-1020
Main Authors: Mikhailin, N. Yu, Parfeniev, R. V., Chernyaev, A. V., Shamshur, D. V., Andrianov, G. O.
Format: Article
Language:English
Subjects:
2016
ABLATION
ALLOYS
DENSITY OF STATES
DOPED MATERIALS
Electrons
FERMI LEVEL
Hydrostatic compression
Hydrostatic pressure
HYDROSTATICS
Indium
MAGNETIC FIELDS
Magnetic Materials
Magnetism
MATERIALS SCIENCE
November 15–16
Physics
Physics and Astronomy
SEMICONDUCTOR MATERIALS
St. Petersburg
Superconductivity
Valence band
XV International Conference “Thermoelectrics and Their Applications—2016”
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Summary: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 ≥ 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 (Pb z Sn 1– z ) 0.95 In 0.05 Te with varying lead content z .
ISSN:1063-7826
1090-6479
DOI:10.1134/S106378261708022X