Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-03-14
Eur. Phys. J. B 5, 473 (1998)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 6 figures, RevTeX, final version contains an additional phase diagram for smaller Hund's rule coupling. to appear in
Scientific paper
10.1007/s100510050468
The importance of Hund's rule coupling for the stabilization of itinerant ferromagnetism is investigated within a two-band Hubbard model. The magnetic phase diagram is calculated by finite-temperature quantum Monte Carlo simulations within the dynamical mean-field theory. Ferromagnetism is found in a broad range of electron fillings whereas antiferromagnetism exists only near half filling. The possibility of orbital ordering at quarter filling is also analyzed.
Held Karsten
Vollhardt Dieter
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