Phys. Rev. Lett. 89, 077001 (2002) [4 pages]Zinc Impurities in d-Wave SuperconductorsReceived 20 December 2001; published 26 July 2002 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 and an enhancement of antiferromagnetic spin correlations. 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 resonating-valence-bond picture. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.077001
DOI:
10.1103/PhysRevLett.89.077001
PACS:
74.62.Dh, 71.27.+a, 74.72.–h
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