FREYTAG, R and KELLER, J (1991) INFLUENCE OF A FERROMAGNETIC EXCHANGE INTERACTION ON THE KONDO EFFECT IN ANDERSON IMPURITY SYSTEMS. ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 85 (1). pp. 87-92. ISSN 0722-3277,
Full text not available from this repository.Abstract
In the usual description of heavy fermion systems by the Anderson Hamiltonian the Coulomb interaction is taken into account explicitly only between f-electrons. All the other parts of the Coulomb interaction, in particular the Coulomb interaction between f-electrons and conduction electrons, are contained only on the average in the parameters of the Hamiltonian. In this paper the ferromagnetic exchange interaction between conduction and f-electrons is added explicitly to the single-ion Anderson Hamiltonian, and its influence on the appearance of a Kondo effect in such systems is studied. This is done with help of a self-consistent perturbation theory in the hybridization and the exchange interaction. The results, which show a strong competition between the antiferromagnetic interaction induced by the hybridization of f-electrons and conduction electrons are compared with the results of an earlier mean-field calculation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CONSISTENT PERTURBATION-THEORY; DILUTE MAGNETIC-ALLOYS; LARGE-N EXPANSION; VALENCE FLUCTUATIONS; DYNAMICS; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/55173 |
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