Insensitivity of superconductivity to disorder in the cuprates
  Using a dynamical cluster quantum Monte Carlo approximation, we investigate the effect of local disorder on the stability of d-wave superconductivity including the effect of electronic correlations in both particle-particle and particle-hole channels. With increasing impurity potential, we find an initial rise of the critical temperature due to an enhancement of anti-ferromagnetic spin correlations, followed by a decrease of Tc due to scattering from impurity-induced moments and ordinary pairbreaking. We discuss the weak initial dependence of Tc on impurity concentration found in comparison to experiments on cuprates. 
A.F. Kemper, D.G.S.P. Doluweera, T.A. Maier, M. Jarrell, P.J.   Hirschfeld and H-P. Cheng