Cellular dynamical mean field approach to strongly correlated systems

Document Type

Article

Publication Date

10-29-2001

Abstract

A cellular version of dynamical mean field theory (DMFT) which gives a natural generalization of its original single-site construction was analyzed using coherent potential approximation (CPA) technique. The solution of the cluster embedded in a medium results in a cluster Green's function matrix and a cluster self-energy matrix. The effective action for the cluster degrees of freedom was obtained by integrating all the variables in a path integral. The results show that DMFT produces information on problems where physics is local while the cluster methods is useful for the problems where correlations between more sites and orbitals are taken into account.

Identifier

0035968783 (Scopus)

Publication Title

Physical Review Letters

ISSN

00319007

First Page

1864011

Last Page

1864014

Issue

18

Volume

87

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