Abstract
We consider an impurity model consistent of the 4f 0-singlet and a multiplet of total angular momentumj of the 4f 1 configuration hybridized with conduction states of the metal. The model is solved by Bethe-ansatz and related to theU→∞ limit of the Anderson model. If thef-level is far below the Fermi level the equations are reduced to the Bethe-ansatz solution of the Coqblin-Schrieffer model. Approximate analytical results valid in the mixed valence regime are given. A numerical solution for the impurity groundstate energy,f-level occupancy and charge susceptibility as a function of thef-level energy and in the absence of a magnetic field is presented.
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References
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On a Heisenberg fellowship of the Deutsche Forschungsgemeinschaft
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Schlottmann, P. Bethe-ansatz solution of the groundstate of a model for mixed-valent Ce and Yb impurities in metals. Z. Physik B - Condensed Matter 49, 109–114 (1982). https://doi.org/10.1007/BF01314745
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DOI: https://doi.org/10.1007/BF01314745