Spectral density functional approach to electronic correlations and magnetism in crystals

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A novel approach to electronic correlations and magnetism of crystals based on realistic electronic structure calculations is reviewed. In its simplest form it is a combination of the ``local density approximation'' (LDA) and the dynamical mean field theory (DMFT) approaches. Using numerically exact QMC solution to the effective DMFT multi-orbital quantum-impurity problem, a successful description of electronic structure and finite temperature magnetism of transition metals has been achieved. We discuss a simplified perturbation LDA+DMFT scheme which combines the T-matrix and fluctuation-exchange approximation (TM-FLEX). We end with a discussion of cluster generalization of the non-local DMFT scheme and its applications to the magnetism and superconductivity of high-Tc superconductors.
37 pages, to be published in: "Electron Correlations and Materials Properties 2" ed. by A. Gonis (Kluwer, NY)

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/20255

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0211076
 http://arxiv.org/abs/cond-mat/0211076

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arXiv