Superconductivity in electron-doped cuprates: Gap shape change and symmetry crossover with doping
Strongly Correlated Electrons
2009-11-07 v2 Superconductivity
Abstract
The Kohn-Luttinger mechanism for superconductivity is investigated in a model for the electron doped cuprates. The symmetry of the order parameter of the superconducting phase is determined as a function of the geometry of the Fermi surface together with the structure of the electron-hole susceptibility. It is found to remain d_{x^2-y^2} wave within a large doping range. The shape of the gap anisotropy evolves with doping, with the maximum gap moving away from (pi ,0), in good agreement with recent experiments. As the shift of the maximum increases, a crossover to d_{xy}-symmetry is found.
Keywords
Cite
@article{arxiv.cond-mat/0206208,
title = {Superconductivity in electron-doped cuprates: Gap shape change and symmetry crossover with doping},
author = {Francisco Guinea and Robert S. Markiewicz and Maria A. H. Vozmediano},
journal= {arXiv preprint arXiv:cond-mat/0206208},
year = {2009}
}
Comments
7 eps figures, revtex. Corrected and expanded version accepted for Phys. Rev. B