Document Type

Article

Publication Date

January 2011

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, Tc may be enhanced through an increase in the d-wave pairing interaction (Vd) or the bare pairing susceptibility (χ0d). At optimal doping, where Vd is revealed to be featureless, we find a power-law behavior of χ0d(ω=0), replacing the BCS log, and strongly enhanced Tc. We suggest experiments to verify our predictions.

Comments

This article originally appeared in Physical Review Letters, volume 106, issue 4, 2011, published by the American Physical Society. ©2011 American Physical Society. The article can also be found online at this link.
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