Superconductivity and anomalous transport in PbTe:Tl

ORAL

Abstract

We analyze the transport properties of Tl-doped PbTe. We show that upon doping, Tl has degenerate valence states 1+ and 3+. Quantum valence fluctuations lead to the superconductivity and a charge Kondo effect at low-temperatures and cause linear temperature dependence of resistivity at high temperatures.

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Authors

  • Elihu Abrahams

  • Piers Coleman

    Rutgers University

  • Maxim Dzero

    DOE Ames Laboratory

  • J. Schmalian

    Iowa State University/Ames Lab, Iowa State University, Ames Lab.\ and Dept.\ Phys.\ Astron., Iowa State U., Ames, IA 50011