A Consistent Description of the Pairing Symmetry in Hole and Electron Doped Cuprates Within the Two-Dimensional Hubbard Model

1997/10/02 by Kazuhiko Kuroki, Hideo Aoki · 1 citation
Materials Science · Physics and Astronomy · #Cuprate #Electronic and Structural Properties of Oxides #Fermi Gamma-ray Space Telescope #Fermi surface #Gravitational singularity #Hubbard model #Iron-based superconductors research #Pairing #Physics of Superconductivity and Magnetism #Pseudogap #Quantum Monte Carlo #Symmetry (geometry) #cond-mat.str-el

paper · pdf · doi:10.1143/jpsj.67.1533

4 pages, RevTeX, uses epsf.sty and multicol.sty

arxiv created 1997/10/02 · openalex publication_date 1998/05/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Quantum Monte Carlo is used to calculate various pairing correlations of the 2D Hubbard model possessing band features experimentally observed in the cuprates. In the hole-doped case, where the Fermi level lies close to the van Hove singularities around (0,π), the d_x²-y² pairing correlation is selectively enhanced, while in the electron-doped case, where the singularities are far below the Fermi level and the Fermi surface runs through (± π/2,± π/2), both d_x²-y² and d_xy correlations are enhanced with the latter having a √(2)× √(2) structure. The two pairing symmetries can mix to result in a nodeless gap.

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