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Author Kuroki, K. ♦ Aoki, H.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ HUBBARD MODEL ♦ MONTE CARLO METHOD ♦ CUPRATES ♦ CORRELATIONS ♦ CHARGE TRANSPORT ♦ COULOMB FIELD ♦ HYBRIDIZATION ♦ COMPUTERIZED SIMULATION ♦ STRONG-COUPLING MODEL
Abstract A possibility of the electronic origin of the high-temperature superconductivity in cuprates is probed with the quantum Monte Carlo method by revisiting the three-band Hubbard model comprising Cu 3{ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}} and O 2{ital p}{sub {sigma}} orbitals. The {ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}} pairing correlation is found to turn into an increasing function of the repulsion {ital U}{sub {ital d}} within the {ital d} orbitals or the {ital d}-{ital p} level offset {Delta}{var_epsilon}, where the normalized correlation grows with the system size. We have detected this in both the charge-transfer and Mott-Hubbard regimes upon entering the strong-correlation region ({ital U}{sub {ital d}} or {Delta}{var_epsilon}{approx_gt} bare bandwidth). {copyright} {ital 1996 The American Physical Society.}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-06-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 76
Issue Number 23


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