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Superconducting properties of Tl-doped PbTe

Y. Matsushita·P. A. Wianecki·T. H. Geballe·I. R. Fisher
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Abstract

Tl-doped PbTe (Pb_{1-x}Tl_{x}Te) is an anomalous superconductor with a remarkably high maximum T_c value given its relatively low carrier concentration. Here, we present results of systematic measurements of superconducting parameters for this material, for Tl concentrations up to x = 1.4%. We find that it is a Type II, weak-coupled BCS superconductor in the dirty limit and discuss implications for the applicability of the charge Kondo model recently proposed to account for superconductivity in this system.

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Y. Matsushita, P. A. Wianecki, T. H. Geballe, I. R. Fisher. 2006-05-29. Superconducting properties of Tl-doped PbTe. https://arxiv.org/abs/cond-mat/0605717

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