Pseudogaps in the 2D half-filled Hubbard model

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We study the pseudogaps in the spectra of the half-filled 2D Hubbard model using both finite-size and dynamical cluster approximation (DCA) quantum Monte Carlo calculations. A charge pseudogap, accompanied by non-Fermi liquid behavior in the self energy, is shown to persist in the thermodynamic limit. The DCA (finite-size) method systematically underestimates (overestimates) the width of the pseudogap. A spin pseudogap is not seen at half-filling.
4 pages, 5 figures, revtex

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Strongly Correlated Electrons, Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/29816

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9910226
 http://arxiv.org/abs/cond-mat/9910226

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arXiv