Title: GROUND STATE FERROMAGNETISM IN A GENERALIZED HUBBARD MODEL WITH STRONG CORRELATIONS
Author(s): L.Didukh, O.Kramar (Ternopil State Technical University, Department of Physics, 56 Ruska Str., 46001 Ternopil, Ukraine; E-mail: didukh@tu.edu.te.ua)

The present paper considers the ground state ferromagnetic ordering in a generalized Hubbard model with correlated hopping and interatomic exchange interaction in the case of strong correlations at non-integer band filling. The quasi-particle energy spectrum is obtained by means of a generalized mean-field approximation. The ground state energy of the system and the condition of ferromagnetic state realization are calculated. The dependences of magnetization on energy parameters and band-filling are obtained.

Key words: narrow energy band, ground state energy, ferromagnetism
PACS: 71.10.Fd, 75.10.-b, 75.20.En