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The magnetism of the t-t' Hubbard model

B. Valenzuela·M. A. H. Vozmediano·F. Guinea
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Abstract

The magnetic properties of the t-t' Hubbard Model in the two dimensional square lattice are studied within an unrestricted Hartree-Fock approximation in real space. The interplay between antiferromagnetism, ferromagnetism, phase separation and inhomogeneous magnetic textures is studied. It is shown that, at sufficiently large values of t'/t, a rich fenomenology is to be expected between the antiferromagnetic phase at half filling and the ferromagnetic phase a lower fillings.

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B. Valenzuela, M. A. H. Vozmediano, F. Guinea. 1999-09-15. The magnetism of the t-t' Hubbard model. https://arxiv.org/abs/cond-mat/9909224

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