Quantum Monte Carlo Evidence for Superconductivity in the Three-Band Hubbard Model in Two Dimensions

Kazuhiko Kuroki and Hideo Aoki
Phys. Rev. Lett. 76, 4400 – Published 3 June 1996
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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 3dx2y2 and O 2pσ orbitals. The dx2y2 pairing correlation is found to turn into an increasing function of the repulsion Ud within the d orbitals or the d- p level offset Δɛ, 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 ( Ud or Δɛ> bare bandwidth).

  • Received 6 December 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.4400

©1996 American Physical Society

Authors & Affiliations

Kazuhiko Kuroki and Hideo Aoki

  • Department of Physics, University of Tokyo, Hongo, Tokyo 113, Japan

Comments & Replies

Comment on “Quantum Monte Carlo Evidence for Superconductivity in the Three-Band Hubbard Model in Two Dimensions”

H. Endres, W. Hanke, H. G. Evertz, and F. F. Assaad
Phys. Rev. Lett. 78, 160 (1997)

Kuroki and Aoki Reply:

Kazuhiko Kuroki and Hideo Aoki
Phys. Rev. Lett. 78, 161 (1997)

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Vol. 76, Iss. 23 — 3 June 1996

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