Charge Kondo anomalies in PbTe doped with Tl impurities

Costi, T.A.; Zlatic, V.

doi:10.1103/PhysRevLett.108.036402

Journal Article

PreJuSER-19735

Charge Kondo anomalies in PbTe doped with Tl impurities

Costi, T. A.FZJ* ; Zlatic, V.FZJ*

2012
APS College Park, Md.

Physical review letters 108, 036402 (2012) [10.1103/PhysRevLett.108.036402]

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Please use a persistent id in citations: http://hdl.handle.net/2128/7398 doi:10.1103/PhysRevLett.108.036402

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.

Keyword(s): J

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Physics, Multidisciplinary

Note: We thank K. M. Seemann, D. J. Singh, H. Murakami, P. Coleman, G. Kotliar, and I. R. Fisher for discussions and D. J. Singh, H. Murakami, and I. R. Fisher for data [8,22]. V. Z. acknowledges support by Croatian MZOS Grant No. 0035-0352843-2849, NSF Grant No. DMR-1006605, and Forschungszentrum Julich. T. A. C. acknowledges supercomputer support from the John von Neumann Institute for Computing (Julich).

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Appears in the scientific report 2012

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Medline