Strong coupling phases of the $t-t'$ Hubbard model

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 01 Jan 1996Embargo end date: 01 Jan 1996Publisher:American Physical Society (APS)

Authors: González Carmona, José; Alvarez, J. V.;

doi: 10.48550/arxiv.cond-mat/9609162

arXiv: cond-mat/9609162

handle: 10261/140743

Strong coupling phases of the $t-t'$ Hubbard model

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Abstract

We study the strong-coupling regime of the t-t′ Hubbard model, filled up to the level of the van Hove singularities, by means of an exact diagonalization approach. We characterize the different phases of the model by the different sectors of the Hubert space with given quantum numbers. By looking for the ground state of the system, we find essentially the competition between a state with incipient ferromagnetism and other mimicking a d-wave condensate, which has the lowest energy in a large region of the phase space. ©1997 American Physical Society

5 págs.; 5 figs.

Peer Reviewed

Related Organizations

Carlos III University of Madrid
Spain
Spanish National Research Council
Spain
Institute for the Structure of Matter
Spain

Keywords

Condensed Matter (cond-mat), FOS: Physical sciences, Condensed Matter

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