New Type of Charge and Magnetic order in the Ferromagnetic Kondo Lattice

Details New Type of Charge and Magnetic order in the Ferromagnetic Kondo Lattice New Type of Charge and Magnetic order in the Ferromagnetic Kondo Lattice

1999-12-13

arxiv.org/abs/cond-mat/9912227v2

Physical Review Letters 85, p. 3720 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, Submited to PRL (minor changes in text and figures)

Scientific paper

10.1103/PhysRevLett.85.3720

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. Due to the competition between double and superexchange, we find a region where the formation of magnetic polarons induces a charge ordered (CO) state which survives also for V=0. This mechanism should be taken into account in theories of charge ordering involving spin degrees of freedom.

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