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Ferromagnetism in the Hubbard model on fcc-type lattices |
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| Authors: | M. Ulmke |
| Affiliation: | Theoretische Physik III, Universit?t Augsburg, 86135 Augsburg, Germany, DE |
| Abstract: | 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. Received: 6 August 1997 / Accepted: 20 August 1997 |
| Keywords: | PACS. 71.27.+a: Strongly correlated electron systems heavy fermions - 75.10.Lp: Band and itinerant models - 75.30.Kz: Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) |
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