Charge and spin inhomogeneous phases in the Ferromagnetic Kondo Lattice Model

Details Charge and spin inhomogeneous phases in the Ferromagnetic Kondo Lattice Model Charge and spin inhomogeneous phases in the Ferromagnetic Kondo Lattice Model

2003-03-15

arxiv.org/abs/cond-mat/0303292v1

Physical Review B 65, p. 134444 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 11 figures

Scientific paper

10.1103/PhysRevB.65.134444

We study numerically the one-dimensional ferromagnetic Kondo lattice. This model is widely used to describe nickel and manganese perovskites. Due to the competition between double and super-exchange, we find a region where the formation of magnetic polarons induces a charge-ordered state. This ordering is present even in the absence of any inter-site Coulomb repulsion. There is an insulating gap associated to the charge structure formation. We also study the insulator-metal transition induced by a magnetic field which removes simultaneously both charge and spin ordering.

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