Diagrammatic theory for twofold degenerate Anderson impurity model
Abstract
The twofold degenerate Anderson impurity model [1-4] is investigated and the strong electronic correlations of d-electrons of impurity ion are taken into account by elaborating suitable diagram technique. We discuss the properties of the Slater-Kanamori model [2-4] of d-impurity electrons. After finding the eigenfunctions and eigenvalues of all 16 local states, we determine the local one-particle propagator. Then we construct the perturbation theory around the atomic limit of the impurity ion and obtain the Dyson type equation for the renormalized one-particle propagator. Diagrammatic theory has been developed and correlation function determined. Special diagrammatic approximation was discussed and summation of diagram has been considered.
Keywords
Cite
@article{arxiv.1301.4386,
title = {Diagrammatic theory for twofold degenerate Anderson impurity model},
author = {V. A. Moskalenko and L. A. Dohotaru and D. F. Digor and I. D. Cebotari},
journal= {arXiv preprint arXiv:1301.4386},
year = {2015}
}
Comments
14 pages, 4 figures