Third Order Perturbation Analysis of Pairing Symmetry in Two-Dimensional Hubbard Model

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dc.creatorFukazawa, Hirono
dc.creatorYamada, Kosaku
dc.date2002-08-03
dc.date2002-08-07
dc.date.accessioned2026-07-07T06:26:37Z
dc.date.available2026-07-07T06:26:37Z
dc.descriptionWe study the superconducting instabilities of singlet and triplet pairing in a two-dimensional Hubbard model on the basis of the third-order perturbation theory (TOPT). We investigate the effect of the vertex correction that is given by TOPT, comparing with the study with only the second-order effective interaction. In our results, a stable p-wave pairing state spreads from low to intermediate electron density. A dx2-y2-wave pairing is dominant for the high density near a half-filling. It is shown that the vertex correction plays an essential role in making the p-wave pairing state dominant.
dc.description10 pages, 11 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0208057
dc.identifierhttp://arxiv.org/abs/cond-mat/0208057
dc.identifierJ. Phys. Soc. Jpn. 71 (2002) 1541
dc.identifierdoi:10.1143/JPSJ.71.1541
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97165
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleThird Order Perturbation Analysis of Pairing Symmetry in Two-Dimensional Hubbard Model
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