Microscopic conditions favoring itinerant ferromagnetism: Hund's rule coupling and orbital degeneracy
Abstract
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.Keywords
All Related Versions
This publication has 0 references indexed in Scilit: