Generalized Schrieffer-Wolff Transformation of 2 Kondo Impurity Problem
Strongly Correlated Electrons
2007-05-23 v1 Mesoscale and Nanoscale Physics
Abstract
We have carried out a generalized Schrieffer-Wolff transformation of an Anderson two-impurity Hamiltonian to study the low-energy spin interactions of the system. The second-order expansion yields the standard Kondo Hamiltonian for two impurities with additional scattering terms. At fouth-order, we get the well-known RKKY interaction. In addition, we also find an antiferromagnetic superexchange coupling and a correlated Kondo coupling between the two impurities.
Keywords
Cite
@article{arxiv.cond-mat/0602223,
title = {Generalized Schrieffer-Wolff Transformation of 2 Kondo Impurity Problem},
author = {T. Tzen Ong and B. A. Jones},
journal= {arXiv preprint arXiv:cond-mat/0602223},
year = {2007}
}
Comments
6 pages, 3 figures