A model for electron correlations in hybrid bands

Publisher Website
Google Scholar
Abstract
We consider the correlated motion of electrons in a conduction band hybridizing with completely localized non-degenerate atomic levels. Only intra-atomic Coulomb repulsion is included. In the limit of large Coulomb repulsion the quasi-particle bands are those of the non-interacting electrons but with hybridization matrix elements reduced by excluding atomic sites occupied by other electrons of opposite spin. Self-consistent solutions giving a ferromagnetic ground state exist if the hybridization is sufficiently large, the number of conduction band states lying below the atomic energy level T0 is small and the Fermi level lies just below T0. If the Fermi level lies above T0 the ground state is non-magnetic. In the ferromagnetic state the spin polarization of the conduction band is always parallel to the localized d moments. Possible implications for the ferromagnetism of the transition metals are discussed.

This publication has 8 references indexed in Scilit: