Ferromagnetism in the Hubbard Model on fcc-type lattices

Details Ferromagnetism in the Hubbard Model on fcc-type lattices Ferromagnetism in the Hubbard Model on fcc-type lattices

1997-04-28

arxiv.org/abs/cond-mat/9704229v2

Eur. Phys. J. B 1, 301 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

typos corrected, references updated, discussion extented

Scientific paper

10.1007/s100510050186

The Hubbard model on fcc-type lattices is studied in the dynamical mean-field theory of infinite spatial dimensions. At intermediate interaction strength finite temperature Quantum Monte Carlo calculations yield a second order phase transition to a highly polarized, metallic ferromagnetic state. The Curie temperatures are calculated as a function of electronic density and interaction strength. A necessary condition for ferromagnetism is a density of state with large spectral weight near one of the band edges.

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