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 χ 0d(ω=0), replacing the BCS log, and strongly enhanced T c. We suggest experiments to verify our predictions. © 2011 American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Yang, S., Fotso, H., Su, S., Galanakis, D., Khatami, E., She, J., Moreno, J., Zaanen, J., & Jarrell, M. (2011). Proximity of the superconducting dome and the quantum critical point in the two-dimensional Hubbard model. Physical Review Letters, 106 (4) https://doi.org/10.1103/PhysRevLett.106.047004