Buckling and d-wave pairing in HiTc superconductors.

Jepsen O., Andersen O.K., Dasgupta I., Savrasov S.

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 planar oxygen atoms. 

A reprint of this paper can be obtained from cond-mat in Germany or in the US.

Journal of the Physics and Chemistry of Solids, 59 1718-22, 1998.

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