https://doi.org/10.1007/s100510050186
Ferromagnetism in the Hubbard model on fcc-type lattices
Theoretische Physik III,
Universität Augsburg, 86135 Augsburg, Germany
Corresponding author: a Ulmke@physik.uni-augsburg.de
Received:
6
August
1997
Accepted:
20
August
1997
Published online: 15 February 1998
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.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
