Pairing Mechanism in the Two-Dimensional Hubbard Model
arXiv:cond-mat/9606217
Abstract
Here we discuss Quantum Monte Carlo results for the magnetic susceptibility, single-particle spectral weight and the irreducible particle-particle interaction vertex of the two-dimensional Hubbard model. In the doped system, as the temperature is lowered below J=4t^2/U, short-range antiferromagnetic correlations develop. These lead to a narrow low-energy quasiparticle band with a large Fermi surface and a particle-particle vertex which increases at large momentum transfer, which favor d_{x^2-y^2}-pairing.
Latex, uses lprocldpf and epsf, 5 pages and 4 figures, to be published in the proceedings of the "10th Anniversary HTS Workshop on Physics, Materials and Applications" held in Houston on March 12-16, 1996