Study on Ferromagnetism of Falicov-Kimball Model

Starting from the spin-one-half Falicov-Kimball model and the assumption of existing ferromagnetic coupling between inner-shell electrons, the effect of the hybridization between the inner-shell and outer-shell electrons on the ferromagnetism of the model are investigated. The mean field approximation is adopted and the on-site coulomb interaction between inner-shell and outer-shell electrons is taken into account. Results show that three hybridized energy bands are formed due to the hybridization of inner-shell and outer-shell electrons, and the material ferromagnetism is then affected.