Spin order in the one-dimensional Kondo and Hund lattices

Details Spin order in the one-dimensional Kondo and Hund lattices Spin order in the one-dimensional Kondo and Hund lattices

2004-09-13

arxiv.org/abs/cond-mat/0409332v1

Physics

Condensed Matter

Strongly Correlated Electrons

PRL, to appear

Scientific paper

10.1103/PhysRevLett.93.177204

We study numerically the one-dimensional Kondo and Hund lattices consisting of localized spins interacting antiferro or ferromagnetically with the itinerant electrons, respectively. Using the Density Matrix Renormalization Group we find, for both models and in the small coupling regime, the existence of new magnetic phases where the local spins order forming ferromagnetic islands coupled antiferromagnetically. Furthermore, by increasing the interaction parameter $|J|$ we find that this order evolves toward the ferromagnetic regime through a spiral-like phase with longer characteristic wave lengths. These results shed new light on the zero temperature magnetic phase diagram for these models.

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