Impurity correlations in dilute Kondo alloys
Strongly Correlated Electrons
2009-10-31 v1
Abstract
The single impurity Kondo model is often used to describe metals with dilute concentrations (n_i) of magnetic impurities. Here we examine how dilute the impurities must be for this to be valid by developing a virial expansion in impurity density. The O(n_i^2) term is determined from results on the 2-impurity Kondo problem by averaging over the RKKY coupling. The non-trivial fixed point of the 2-impurity problem could produce novel singularities in the heat capacity of dilute alloys at O(n_i^2).
Keywords
Cite
@article{arxiv.cond-mat/9909186,
title = {Impurity correlations in dilute Kondo alloys},
author = {Victor Barzykin and Ian Affleck},
journal= {arXiv preprint arXiv:cond-mat/9909186},
year = {2009}
}
Comments
6 pages, no figures