Ferromagnetism and disorder: A dynamical mean-field study

Details Ferromagnetism and disorder: A dynamical mean-field study Ferromagnetism and disorder: A dynamical mean-field study

2001-10-10

arxiv.org/abs/cond-mat/0110209v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 3 figures

Scientific paper

10.1016/S0038-1098(01)00520-8

We investigate ferromagnetism in the periodic Anderson model with diagonal disorder. Using dynamical mean-field theory in combination with the modified perturbation theory, the disorder can be included in the calculation consistently, which turns out to be equivalent to the CPA method. Disorder generally reduces the Curie temperature and can for certain configurations completely suppress ferromagnetic order. This can be ascribed to the enhanced quasiparticle damping and the special structure of the density of states.

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