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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 1 Issue 3 (1998) pp 301-304
Ferromagnetism in the Hubbard model on fcc-type lattices
M. Ulmke (a)
Theoretische Physik III, Universität Augsburg, 86135 Augsburg, Germany
Received: 6 August 1997 / Accepted: 20 August 1997
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.
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.)
(a) email: Ulmke@physik.uni-augsburg.de
Online publication: February 24, 1998
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