Charge Kondo anomalies in PbTe doped with Tl impurities

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 non-magnetic 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.

5 pages, 3 figures; published version

References in corpus (3)

• The numerical renormalization group method for quantum impurity systems
• Ab initio studies of electronic structure of defects in PbTe
• Mechanism for large thermoelectric power in negative-U molecular quantum dots

Cited by in corpus (14)

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• Theory of Charge Kondo Effect on Pair Hopping Mechanism
• Evidence of incoherent carriers associated with resonant impurity levels and their influence on superconductivity in the anomalous superconductor Pb${}_{1-x}$Tl${}_x$Te
• Interplay of the Kondo effect with the induced pairing in electronic and caloric properties of T-shaped double quantum dots
• Nonequilibrium Kondo effect by equilibrium numerical renormalization group method: The hybrid Anderson model subject to a finite spin bias
• Anomalous ^{125}Te Nuclear Spin Relaxation Coincident with Charge Kondo Behavior in Superconducting Pb_{1-x}Tl_{x}Te
• Charge-Kondo effect mediated by repulsive interactions
• Strongly correlated electrons in superconducting islands with fluctuating Cooper pairs
• Charge Kondo Effect and Superconductivity in the Falikov-Kimball model with the Pair Hopping
• Quantum criticality and formation of a singular Fermi liquid in the attractive SU(N > 2) Anderson model
• Quantum phase transitions in superconductor--quantum-dot--superconductor Josephson structures with attractive intradot interaction
• Charge Kondo Effect in Thermoelectric Properties of Lead Telluride doped with Thallium Impurities