We have investigated whether the electron-phonon interaction can support a d-wave gap-anisotropy. On the basis of models derived from LDA calculations, as well as LDA linear-response calculations we argue that this is the case, for materials with buckled or dimpled CuO2 planes, for the so-called buckling modes, which involve out-of-plane movements of the plane oxygens.
@article{arxiv.cond-mat/9710266,
title = {Buckling and d-Wave Pairing in HiTc-Superconductors},
author = {O. Jepsen and O. K. Andersen and I. Dasgupta and S. Savrasov},
journal= {arXiv preprint arXiv:cond-mat/9710266},
year = {2009}
}