Thermodynamic Consistency of the Dynamical Mean-Field Theory of the Double-Exchange Model

Abstract

Although diagrammatic perturbation theory fails for the dynamical-mean field theory of the double-exchange model, the theory is nevertheless Phi-derivable and hence thermodynamically consistent, meaning that the same thermodynamic properties are obtained from either the partition function or the Green's function. We verify this consistency by evaluating the magnetic susceptibility and Curie temperature for any Hund's coupling.

arXiv comment9 pages, 1 figure

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Cited by in corpus (6)

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• Short-Range Ordered Phase of the Double-Exchange Model in Infinite Dimensions
• Dynamical Mean-Field Study of the Ferromagnetic Transition Temperature of a Two-Band Model for Colossal Magnetoresistance Materials
• Magnetic Instabilities and Phase Diagram of the Double-Exchange Model in Infinite Dimensions