Two Anderson Impurities in the Kondo Limit, Doublet States

Details Two Anderson Impurities in the Kondo Limit, Doublet States Two Anderson Impurities in the Kondo Limit, Doublet States

2005-03-07

arxiv.org/abs/cond-mat/0503163v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figurea

Scientific paper

We analyze two pairs of doublet states for the two Anderson impurity problem. We found that for short interimpurity distances they have a lower energy than the ferro triplet and the antiferro singlet. For medium to long distances between the impurities, the doublets also have a lower energy than the two decoupled Kondo-singlet state for most of the range of interest. The mechanism behind their energy gain is an coherence enhanced Kondo-like interaction.

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