title: Pseudogaps in the 2D Hubbard Model.
abstract: We study the pseudogaps in the spectra of the 2D Hubbard model using both finite-size and dynamical cluster approximation (DCA) quantum Monte Carlo calculations. At half-filling, a charge pseudogap, accompanied by non-Fermi-liquid behavior in the self-energy, is shown to persist in the thermodynamic limit. The DCA (finite-size) method systematically underestimates (overestimates) the width of the pseudogap. A spin pseudogap is not seen at half-filling. At finite doping, a divergent d-wave pair susceptibility is observed.
authors.affiliation: Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221-0011.
authors.initials: C
authors.lastname: Huscroft
authors.initials: M
authors.lastname: Jarrell
authors.initials: T
authors.lastname: Maier
authors.initials: S
authors.lastname: Moukouri
authors.initials: AN
authors.lastname: Tahvildarzadeh