Magnetic Susceptibility of the Double-Exchange Model in the RKKY Limit

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The magnetic susceptibility and Edwards-Anderson order parameter q of the spin-glass-like (SGL) phase of the double-exchange model are evaluated in the weak-coupling or RKKY limit. Dynamical mean-field theory is used to show that q=M(T/Tsg)^2, where M is the classical Brillouin function and Tsg is the SGL transition temperature. The correlation length of the SGL phase is determined by a correlation parameter Q that maximizes Tsg and minimizes the free energy. The magnetic susceptibility has a cusp at Tsg and reaches a nonzero value as T goes to zero.
8 pages, 2 figures

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Strongly Correlated Electrons, Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/112237

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0606699
 http://arxiv.org/abs/cond-mat/0606699

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arXiv