Quantum Monte Carlo evidence for superconductivity in the three-band hubbard Model in Two Dimensions
Journal Article
·
· Physical Review Letters
- Department of Physics, University of Tokyo, Hongo, Tokyo 113 (Japan)
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.}
- OSTI ID:
- 285996
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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