Single-particle dynamics of the Anderson model: a local moment approach

Details Single-particle dynamics of the Anderson model: a local moment approach Single-particle dynamics of the Anderson model: a local moment approach

2002-08-14

arxiv.org/abs/cond-mat/0208274v1

J. Phys.: Condens. Matter 14 (2002) 6737-6760

Physics

Condensed Matter

Strongly Correlated Electrons

26 pages, 9 figures

Scientific paper

10.1088/0953-8984/14/26/313

A non-perturbative local moment approach to single-particle dynamics of the general asymmetric Anderson impurity model is developed. The approach encompasses all energy scales and interaction strengths. It captures thereby strong coupling Kondo behaviour, including the resultant universal scaling behaviour of the single-particle spectrum; as well as the mixed valent and essentially perturbative empty orbital regimes. The underlying approach is physically transparent and innately simple, and as such is capable of practical extension to lattice-based models within the framework of dynamical mean-field theory.

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