Bethe-ansatz solution of a model for a mixed valent impurity with two magnetic configurations: II. Numerical solution of the thermodynamic equations |
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| Authors: | A A Aligia C A Balseiro C R Proetto P Schlottmann |
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| Institution: | (1) Centro Atómico Bariloche and Universidad Nacional de Cuyo, 8400 Bariloche, Argentina;(2) Fachbereich Physik, Freie Universität Berlin, D-1000 Berlin, Germany;(3) Department of Physics, University of California, Berkeley, California, USA;(4) Institut für Theoretische Physik, Universität Göttingen, Federal Republic of Germany;(5) Institut für Festkörperforschung der Kernforschungsanlage Jülich, Jülich, Federal Republic of Germany;(6) Present address: Department of Physics, Temple University, 19122, Philadelphia, USA |
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| Abstract: | A mixed valence impurity with two magnetic configurations of total angular momentumJ
2 andJ
1=J
2+1/2, respectively, coupled by conduction electrons with total angular momentum 1/2 via a hybridization matrix element is considered. The thermodynamic Bethe-ansatz equations derived previously are solved numerically for various values ofJ
2. Thef-level occupation, the entropy, the magnetic susceptibility and the specific heat are obtained as a function of temperature for variousf-level positions. The magnetic field dependence is also discussed in the limit of integer valence (exchange model).Supported by the CONICET, Argentina |
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