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Cited by 405

The DOI matches its Crossref record; 18 of the 18 references it cites were found in a registry or an index.

Mixed valence as an almost broken symmetry

Coleman, Piers·1987·Physical Review B
DOI 10.1103/physrevb.35.5072
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Abstract

By using a generalized version of the infinite-$U$ Anderson model, strong-coupling properties of mixed-valence systems are modeled by means of an expansion about a broken-symmetry mean-field theory. A renormalized Fermi liquid, with heavy-fermion bands in the lattice is an intrinsic feature of this mean-field theory. Strong-coupling divergence of the Kondo coupling constant arises as a direct consequence of the zero-mode fluctuations about the broken-symmetry state. In the large-degeneracy limit these fluctuations vanish and the broken-symmetry state is an exact solution, explicitly confirmed for the single-impurity case by a new Bethe-ansatz solution. The crossover to strong coupling is a vestige of the phase transition into the broken-symmetry state. Landau parameters, charge and spin correlations of the heavy Fermi liquid are directly related to the fluctuations about the broken-symmetry state. The general approach presented is applicable to an arbitrary number of impurities or a lattice. Analytic results are presented for the Landau parameters, the dynamical charge and spin correlations in the one- and the two-impurity models, and the one-impurity $f$ spectral function.

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Metadata

Authors
Coleman, P.
Venue
Physical Review B
Publisher
American Physical Society (APS)
Published
1987-04-01
Volume
35
Issue
10
Pages
5072-5116
ISSN
0163-1829 (ISSN-L)
DOI
10.1103/physrevb.35.5072
OpenAlex
W2010888887
Cited by
405
References
18
FWCI
6.02
Type
journal article
Language
en
Open access
closed

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