Title: A generating functional approach to the sd-model with strong correlations
Author(s):

	Yu.A.Izyumov (Institute for Metal Physics of the RAS, Ural Division 620219 Ekaterinburg, Russia) ,
	N.I.Chaschin (Institute for Metal Physics of the RAS, Ural Division 620219 Ekaterinburg, Russia) ,
	D.S.Alexeev (Institute for Metal Physics of the RAS, Ural Division 620219 Ekaterinburg, Russia) ,

A Kadanoff-Baym-type generating functional approach, earlier developed by the authors to strongly correlated systems, is applied to the sd-model with strong sd-coupling. Formalism of the Hubbard X-operators was used, and equation for electron Green's function was derived with functional derivatives over external fluctuating fields. Iterations in this equation generate a perturbation theory near the atomic limit. Hartree-Fock type approximation is developed within the framework of this theory, and the problem of a metal-insulator phase transition in sd-model is discussed.

Key words: theories and models of many-electron systems, lattice fermion models, strongly correlated electron systems
PACS: 71.10.-w, 71.10.Fd, 71.27.+a