Random Kondo Alloys

Details Random Kondo Alloys Random Kondo Alloys

2007-01-24

arxiv.org/abs/cond-mat/0701598v1

Physics

Condensed Matter

Strongly Correlated Electrons

20 pages, 9 figures

Scientific paper

The interplay between the Kondo effect and disorder is studied. This is done by applying a matrix coherent potential approximation (CPA) and treating the Kondo interaction on a mean-field level. The resulting equations are shown to agree with those derived by the dynamical mean-field method (DMFT). By applying the formalism to a Bethe tree structure with infinite coordination the effect of diagonal and off-diagonal disorder are studied. Special attention is paid to the behavior of the Kondo- and the Fermi liquid temperature as function of disorder and concentration of the Kondo ions. The non monotonous dependence of these quantities is discussed.

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