Charge Kondo Anomalies in PbTe Doped with Tl Impurities

T. A. Costi and V. Zlatić
Phys. Rev. Lett. 108, 036402 – Published 18 January 2012

Abstract

We investigate the properties of PbTe doped with a small concentration x of Tl impurities acting as acceptors and described by Anderson impurities with negative onsite correlation energy. We use the numerical renormalization group method to show that the resulting charge Kondo effect naturally accounts for the unusual low temperature and doping dependence of normal state properties, including the self-compensation effect in the carrier density and the nonmagnetic Kondo anomaly in the resistivity. These are found to be in good qualitative agreement with experiment. Our results for the Tl s-electron spectral function provide a new interpretation of point contact data.

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  • Received 2 August 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.036402

© 2012 American Physical Society

Authors & Affiliations

T. A. Costi1 and V. Zlatić1,2,3

  • 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
  • 2Institute of Physics, Zagreb POB 304, Croatia
  • 3J. Stefan Institute, SI-1000 Ljubljana, Slovenia

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Issue

Vol. 108, Iss. 3 — 20 January 2012

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