The energy-scale-dependent Composite Operator Method for the single-impurity Anderson model

Details The energy-scale-dependent Composite Operator Method for the single-impurity Anderson model The energy-scale-dependent Composite Operator Method for the single-impurity Anderson model

2006-05-08

arxiv.org/abs/cond-mat/0605182v1

Eur. Phys. J. B 37, 465 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1140/epjb/e2004-00082-4

The recently developed energy-scale-dependent Composite Operator Method is applied to the single-impurity Anderson model. A fully self-consistent solution is given and analyzed. At very low temperatures, the density of states presents, on the top of the high-energy background, a Kondo-like peak whose parameter dependence is discussed in detail. The proposed method reproduces the exact results known in the literature with very low numerical effort and it is applicable for arbitrary values of the external parameters.

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