Does Simple Two-Dimensional Hubbard Model Account for High-Tc Superconductivity in Copper Oxides?

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dc.creatorAimi, Takeshi
dc.creatorImada, Masatoshi
dc.date2007-08-25
dc.date.accessioned2026-07-07T08:46:37Z
dc.date.available2026-07-07T08:46:37Z
dc.descriptionWe reexamine whether the essence of high-Tc superconductivity is contained in doped Hubbard models on the square lattice by using recently developed pre-projected Gaussian-basis Monte Carlo method. The superconducting correlations of the dx2-y2 wave symmetry in the ground state at distance r decays essentially as inverse cubic of r. The upper bound of the correlation at long distances estimated by this unbiased method is 0.001, indicating that recent extensions of dynamical mean-field theories and variational methods yielded at least an order of magnitude overestimates of it. The correlations are too weak for the realistic account of the cuprate high-Tc superconductivity.
dc.description4pages including 4 figures
dc.identifierhttps://arxiv.org/abs/0708.3416
dc.identifierhttp://arxiv.org/abs/0708.3416
dc.identifierJ. Phys. Soc. Jpn. 76 (2007) 113708
dc.identifierdoi:10.1143/JPSJ.76.113708
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/143311
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleDoes Simple Two-Dimensional Hubbard Model Account for High-Tc Superconductivity in Copper Oxides?
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