MICROSCOPIC CONDITIONS FAVORING ITINERANT FERROMAGNETISM - HUNDS RULECOUPLING AND ORBITAL DEGENERACY

Authors
HELD K VOLLHARDT D
Citation
K. Held et D. Vollhardt, MICROSCOPIC CONDITIONS FAVORING ITINERANT FERROMAGNETISM - HUNDS RULECOUPLING AND ORBITAL DEGENERACY, The European Physical Journal. B: Condensed Matter Physics, 5(3), 1998, pp. 473-478
Citations number
35
Categorie Soggetti
Physics, Condensed Matter
Journal title
The European Physical Journal. B: Condensed Matter Physics → ACNP
ISSN journal
14346028
Volume
5
Issue
3
Year of publication
1998
Pages
473 - 478
Database
ISI
SICI code
1434-6028(1998)5:3<473:MCFIF->2.0.ZU;2-F
Abstract
The importance of Hund's rule coupling for the stabilization of itiner ant ferromagnetism is investigated within a two-band Hubbard model. Th e magnetic phase diagram is calculated by finite-temperature quantum M onte-Carlo simulations within the dynamical mean-field theory. Ferroma gnetism is found in a broad range of electron fillings whereas antifer romagnetism exists only near half filling. The possibility of orbital ordering at quarter filling is also analyzed.