title: Proximity of the superconducting dome and the quantum critical point in the two-dimensional Hubbard model.
abstract: We use the dynamical cluster approximation to understand the proximity of the superconducting dome to the quantum critical point in the two-dimensional Hubbard model. In a BCS formalism, T(c) may be enhanced through an increase in the d-wave pairing interaction (V(d)) or the bare pairing susceptibility (χ(0d)). At optimal doping, where V(d) is revealed to be featureless, we find a power-law behavior of χ(0d)(ω=0), replacing the BCS log, and strongly enhanced T(c). We suggest experiments to verify our predictions.
authors.affiliation: Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
authors.forename: S-X
authors.initials: SX
authors.lastname: Yang
authors.forename: H
authors.initials: H
authors.lastname: Fotso
authors.forename: S-Q
authors.initials: SQ
authors.lastname: Su
authors.forename: D
authors.initials: D
authors.lastname: Galanakis
authors.forename: E
authors.initials: E
authors.lastname: Khatami
authors.forename: J-H
authors.initials: JH
authors.lastname: She
authors.forename: J
authors.initials: J
authors.lastname: Moreno
authors.forename: J
authors.initials: J
authors.lastname: Zaanen
authors.forename: M
authors.initials: M
authors.lastname: Jarrell