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Derivation of the Curie-Weiss Law in Dynamical Mean-Field Theory

Krzysztof Byczuk, Dieter Vollhardt

cond-mat.str-elarXiv:cond-mat/0111154

Abstract

We present an analytic derivation of the linear temperature dependence of the inverse static susceptibility χ-1(T,U) T-Tc(U) near the transition from a paramagnetic to a ferromagnetic correlated metal within the dynamical mean-field theory (DMFT) for the Hubbard model. The equations for the critical temperature and interaction strength of the transition are also determined.

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