Reduced effect of impurities on the universal pairing scale in the cuprates

A. B. Vorontsov, Ar. Abanov, M. G. Vavilov, and A. V. Chubukov
Phys. Rev. B 81, 012508 – Published 29 January 2010

Abstract

We consider the effect of nonmagnetic impurities on the onset temperature T for the d-wave pairing in spin-fluctuation scenario for the cuprates. We analyze intermediate coupling regime when the magnetic correlation length ξ/a>1 and the dimensionless coupling u is O(1). In the clean limit, T0.02vf/a in this parameter range and weakly depends on ξ and u. We found numerically that this universal pairing scale is also quite robust with respect to impurities: the scattering rate Γcr needed to bring T down to zero is about four times larger than in weak coupling, in good quantitative agreement with experiments. We provide analytical reasoning for this result.

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  • Received 24 September 2009

DOI:https://doi.org/10.1103/PhysRevB.81.012508

©2010 American Physical Society

Authors & Affiliations

A. B. Vorontsov1, Ar. Abanov2, M. G. Vavilov3, and A. V. Chubukov3

  • 1Department of Physics, Montana State University, Bozeman, Montana 59717, USA
  • 2Department of Physics, Texas A&M University, College Station, Texas 77843, USA
  • 3Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA

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Vol. 81, Iss. 1 — 1 January 2010

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