The asymmetric single-impurity Anderson model - the modified perturbation theory

Preprint

7 May 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9905089

Abstract

We investigate the single-impurity Anderson model by means of the recently introduced modified perturbation theory. This approximation scheme yields reasonable results away from the symmetric case. The agreement with exactly known results for the symmetric case is checked, and results for the non-symmetric case are presented. With decreasing conduction band occupation, the breakdown of the screening of the local moment is observed. In the crossover regime between Kondo limit and mixed-valence regime, an enhanced zero-temperature susceptibility is found.

Keywords

MODIFIED PERTURBATION THEORY
SINGLE IMPURITY ANDERSON
IMPURITY ANDERSON MODEL
PERTURBATION THEORY
ASYMMETRIC SINGLE

All Related Versions

Version 1, 1999-05-07, ArXiv
Published version: Physica B: Condensed Matter, 270 (3), 225.

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