Type II superconducting parameters of Tl-doped PbTe determined from heat capacity and electronic transport measurements

被引：77

作者：

Matsushita, Y. ^{[1
]}

Wianecki, P. A.

Sommer, A. T.

Geballe, T. H.

Fisher, I. R.

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[4] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.74.134512

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tl-doped PbTe (Pb1-xTlxTe) 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.

引用

页数：6

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