Abstract
Using a dynamical cluster quantum Monte Carlo approximation, we investigate the effect of local disorder on the stability of -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 antiferromagnetic spin correlations, followed by a decrease of due to scattering from impurity-induced moments and ordinary pair breaking. We discuss the weak initial dependence of on impurity concentration found in comparison to experiments on cuprates.
- Received 2 February 2009
DOI:https://doi.org/10.1103/PhysRevB.79.104502
©2009 American Physical Society