From Hubbard model to t-J-U model: a canonical transformation formalism, the metal-insulator transition and mean-field state

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dc.creatorYu, Yue
dc.date2003-03-24
dc.date.accessioned2026-07-07T02:50:21Z
dc.date.available2026-07-07T02:50:21Z
dc.descriptionWe prove that the t-J-U model can be deduced from the Hubbard model at a large but finite U by a canonical transformation. We argue that the system may have a metal-insulator transition at a critical on-site Coulomb interaction whose value, however, is smaller than that in previous calculations in which the kinetic energy has a double counting. In a mean field theory and a special choice of the parameters, we show that the metallic state may be equivalent to the gossamer superconducting state proposed by Laughlin recently.
dc.description4 pages, no figure, Revtex
dc.identifierhttps://arxiv.org/abs/cond-mat/0303501
dc.identifierhttp://arxiv.org/abs/cond-mat/0303501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21082
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleFrom Hubbard model to t-J-U model: a canonical transformation formalism, the metal-insulator transition and mean-field state
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