2011/09/30 by T. A. Costi, V. Zlatić, V. Zlatic · 1 citation
Physics and Astronomy · #Anderson impurity model #Anomaly (physics) #Charge (physics) #Charge carrier #Condensed matter physics #Doping #Electrical resistivity and conductivity #Impurity #Kondo effect #Materials science #Physics #Quantum and electron transport phenomena #Quantum mechanics #Rare-earth and actinide compounds #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.108.036402
published as Phys. Rev. Lett. 108, 036402 (2012) · 5 pages, 3 figures; published version
arxiv created 2012/01/18 · openalex publication_date 2012/01/18 · arxiv updated 2012/01/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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.