D-wave pairing near a spin-density-wave instability

Abstract

We investigate the three-dimensional Hubbard model and show that paramagnon exchange near a spin-density-wave instability gives rise to a strong singlet d-wave pairing interaction. For a cubic band the singlet (dx2-y2 and d3z2-r2) channels are enhanced while the singlet (dxy,dxz,dyz) and triplet p-wave channels are suppressed. A unique feature of this pairing mechanism is its sensitivity to band structure and band filling. © 1986 The American Physical Society.