Dependence of the superconducting transition parameters on the solid-solution composition and Te excess in Sn1−z
PbzTe:In |
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| Authors: | R V Parfen’ev D V Shamshur S A Nemov |
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| Institution: | (1) A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia;(2) St. Petersburg State Technical University, 195251 St. Petersburg, Russia |
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| Abstract: | A low-temperature (0.4–4.2 K) measurement of the temperature dependences of the resistivity of two series of samples, SnTe1+y
and Sn0.8Pb0.2Te1+y
solid solution, doped with 5 at.% In, is reported. The parameters of the superconducting transition, namely, the critical
temperatures T
c and the second critical magnetic field H
c2, and their dependences on tellurium excess (0⩽y⩽0.06) have been determined. The observed variation of the critical parameters with increasing tellurium excess in the samples
is associated with a change in the filling by holes of the indium-impurity resonance states.
Fiz. Tverd. Tela (St. Petersburg) 41, 2132–2134 (December 1999) |
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