Single band model for the unconventional superconductivity in both cuprates and ruthenates

摘要

The minimum model to describe the unconventional superconductivity in both cuprates and ruthenates is a single active band with onsite Coulomb interactions. Recent renormalization group analysis shows that such a model can show singlet d-wave or triplet p-wave pairing. The shape of the Fermi surface and the energy of the van Hove singularity in the band is the decisive factor at weak to moderate interaction strengths. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 14]