A consistent description of the pairing symmetry in hole and electron doped cuprates within the two dimensional Hubbard model

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 $(0,\pi )$, the d${}_{x^2-y^2}$ 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 $(\pm \pi /2,\pm \pi /2)$, both d${}_{x^2-y^2}$ and d${}_{xy}$ correlations are enhanced with the latter having a $\sqrt{2}\times \sqrt{2}$ structure. The two pairing symmetries can mix to result in a nodeless gap.

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

References in corpus (4)

• Pairing Correlations in the Two-Dimensional Hubbard Model
• The N-chain Hubbard Model in Weak Coupling
• Enhancement of the d_{x^2-y^2} pairing correlation in the two-dimensional Hubbard model: a quantum Monte Carlo study
• Pairing correlation in the two- and three-leg Hubbard ladders --- Renormalization and quantum Monte Carlo studies

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