Kondo screening and exhaustion in the periodic Anderson model
نویسندگان
چکیده
منابع مشابه
Protracted screening in the periodic Anderson model
The asymmetric infinite-dimensional periodic Anderson model is examined with a quantum Monte Carlo simulation. For small conduction band filling, we find a severe reduction in the Kondo scale, compared to the impurity value, as well as protracted spin screening consistent with some recent controversial photoemission experiments. The Kondo screening drives a ferromagnetic transition when the con...
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The effect of binary alloy disorder on the ferromagnetic phases of f-electron materials is studied within the periodic Anderson model. We find that disorder in the conduction band can drastically enhance the Curie temperature T{c} due to an increase of the local f moment. The effect may be explained qualitatively and even quantitatively by a simple theoretical ansatz. The emergence of an alloy ...
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R. Dong,1 J. Otsuki,2,3 and S. Y. Savrasov1 1Department of Physics, University of California, Davis, California 95616, USA 2Department of Physics, Tohoku University, Sendai 980-8578, Japan 3Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany (Received 19 November 2012; revised manuscript received 19 F...
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Monte Carlo–maximum entropy calculations of the conductivity of the infinite-dimensional periodic Anderson model are presented. We show that the optical conductivity displays anomalies associated with the exhaustion of conduction-band states near the Fermi energy including a Drude weight, which rises with temperature, with weight transferred from a temperature and doping-dependent mid-infrared ...
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We discuss the “exhaustion” problem in the context of the Periodic Anderson Model using Iterated Perturbation theory within the Dynamical Mean Field Theory. We find that the number of electronic states available for screening near the Fermi surface have decreased, a direct confirmation of the exhaustion principle, and find evidence for suppression of the coherence temperature in the lattice cas...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2000
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.61.13465