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Superconductivity in the two-dimensional Hubbard model : Gutzwiller wave function solution
A systematic diagrammatic expansion for Gutzwiller-wave functions (DE-GWF) is formulated and used for the description of superconducting (SC) ground state in the two-dimensional Hubbard model with electron-transfer amplitudes t (and
cris.lastimport.scopus | 2024-04-07T14:46:14Z | |
dc.abstract.en | A systematic diagrammatic expansion for Gutzwiller-wave functions (DE-GWF) is formulated and used for the description of superconducting (SC) ground state in the two-dimensional Hubbard model with electron-transfer amplitudes t (and ${t}'$) between nearest (and next-nearest) neighbors. The method is numerically very efficient and allows for a detailed analysis of the phase diagram as a function of all relevant parameters (U, $\delta , {t}'$) and a determination of the kinetic-energy driven pairing region. SC states appear only for substantial interactions, $U/t_{\sim }^{> } 3$, and for not too large hole doping, $\delta _{\sim }^{< }0.32$ for ${t}'$=0.25t; this upper critical doping value agrees well with experiment for the cuprate high-temperature superconductors. We also obtain other important features of the SC state: (i) the SC gap at the Fermi surface resembles $d_{x^{2}-y^{2}}$ -wave only around the optimal doping and the corrections to this state are shown to arise from the longer range of the pairing; (ii) the nodal Fermi velocity is almost constant as a function of doping and agrees quantitatively with the experimental results; (iii) the SC transition is driven by the kinetic-energy lowering for low doping and strong interactions. | pl |
dc.affiliation | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego | pl |
dc.contributor.author | Kaczmarczyk, Jan - 113748 | pl |
dc.contributor.author | Spałek, Józef - 132018 | pl |
dc.contributor.author | Schickling, Tobias | pl |
dc.contributor.author | Bünemann, Jörg | pl |
dc.date.accessioned | 2015-06-22T15:45:08Z | |
dc.date.available | 2015-06-22T15:45:08Z | |
dc.date.issued | 2013 | pl |
dc.description.admin | [AB] Kaczmarczyk, Jan [SAP13036534] 50000139 | |
dc.description.number | 11 | pl |
dc.description.volume | 88 | pl |
dc.identifier.articleid | 115127 | pl |
dc.identifier.doi | 10.1103/PhysRevB.88.115127 | pl |
dc.identifier.eissn | 1550-235X | pl |
dc.identifier.eissn | 1538-4489 | pl |
dc.identifier.issn | 1098-0121 | pl |
dc.identifier.uri | http://ruj.uj.edu.pl/xmlui/handle/item/10009 | |
dc.language | eng | pl |
dc.language.container | eng | pl |
dc.rights | Dodaję tylko opis bibliograficzny | * |
dc.rights.licence | bez licencji | |
dc.rights.uri | * | |
dc.subtype | Article | pl |
dc.title | Superconductivity in the two-dimensional Hubbard model : Gutzwiller wave function solution | pl |
dc.title.journal | Physical Review. B, Condensed Matter and Materials Physics | pl |
dc.type | JournalArticle | pl |
dspace.entity.type | Publication |