Pairing correlation of the three-band Hubbard model with the nearest attraction

Xiao Zhang, Zimu Xue, Chen Yang and Tianxing Ma
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Xiao Zhang: Department of Physics, Beijing Normal University, Beijing 100875, P. R. China
Zimu Xue: Department of Physics, Beijing Normal University, Beijing 100875, P. R. China
Chen Yang: Department of Physics, Beijing Normal University, Beijing 100875, P. R. China
Tianxing Ma: Department of Physics, Beijing Normal University, Beijing 100875, P. R. China

International Journal of Modern Physics C (IJMPC), 2023, vol. 34, issue 12, 1-10

Abstract: To gain a deeper understanding of the high-temperature superconductivity in doped cuprates, the constrained-path quantum Monte Carlo method was used to explore the superconducting pairing correlation function and effective pairing interaction in the three-band Hubbard model. Our main observation was that in the low doping region, compared to other symmetries, d-wave superconducting pairing dominates. The Coulomb interaction U suppresses d-wave pairing correlation, while the effective pairing interaction is both enhanced by the increasing U and the nearest attraction. These results are used to understand the superconducting state in copper oxide high-temperature superconductors.

Keywords: Hubbard model; Pairing correlation; CPMC (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1142/S0129183123501565

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