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Nesting Mechanism for d-symmetry Superconductors

J. Ruvalds, C. T. Rieck, S. Tewari, J. Thoma, A. Virosztek

cond-matarXiv:cond-mat/9403013

Abstract

A nested Fermi surface with nearly parallel orbit segments is found to yield a singlet d-wave superconducting state at high temperatures for a restricted range of the on-site Coulomb repulsion that avoids the competing spin density wave instability. The computed superconducting transition temperature drops dramatically as the nesting vector is decreased, in accord with recent photo-emission data on the Bi2212 and Bi2201 cuprates.

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