Buckling and d-Wave Pairing in HiTc-Superconductors

TL;DR

This paper explores how electron-phonon interactions, particularly buckling modes involving out-of-plane oxygen movements, can support d-wave gap anisotropy in high-temperature superconductors, based on first-principles calculations.

Contribution

It demonstrates that buckling phonon modes can support d-wave pairing in cuprates, providing a possible mechanism for high-Tc superconductivity.

Findings

Buckling modes involve out-of-plane oxygen movements.

Electron-phonon interaction can support d-wave gap anisotropy.

First-principles calculations support the proposed mechanism.

Abstract

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.