We study the two-dimensional Hubbard model with nonmagnetic Zn impurities modeled by binary diagonal disorder using Quantum Monte Carlo within the Dynamical Cluster Approximation. With increasing Zn content we find a strong suppression of d-wave superconductivity concomitant to a reduction of antiferromagnetic spin fluctuations. Tc vanishes linearly with Zn impurity concentration. The spin susceptibility changes from pseudogap to Curie-Weiss like behavior indicating the existence of free magnetic moments in the Zn doped system. We interpret these results within the RVB picture.
@article{arxiv.cond-mat/0201037,
title = {Zinc Impurities in the 2D Hubbard model},
author = {Th. A. Maier and M. Jarrell},
journal= {arXiv preprint arXiv:cond-mat/0201037},
year = {2007}
}