title: New type of charge and magnetic order in the ferromagnetic kondo lattice
abstract: We study numerically the one dimensional ferromagnetic Kondo lattice, a model widely used to describe nickel and manganese perovskites. By including a nearest-neighbor Coulomb interaction ( V) and a superexchange interaction between the localized moments ( K), we obtain the phase diagram in parameter space for several dopings at T = 0. Because of the competition between double and superexchange, we find a region where the formation of magnetic polarons induces a charge-ordered state which survives also for V = 0. This mechanism should be taken into account in theories of charge ordering involving spin degrees of freedom.
authors.affiliation: Centro Atomico Bariloche and Instituto Balseiro, Comision Nacional de Energia Atomica, 8400 S.C. de Bariloche, Argentina.
authors.initials: DJ
authors.lastname: Garcia
authors.initials: K
authors.lastname: Hallberg
authors.initials: CD
authors.lastname: Batista
authors.initials: M
authors.lastname: Avignon
authors.initials: B
authors.lastname: Alascio