Anisotropic electron-phonon interaction in the cuprates

Details Anisotropic electron-phonon interaction in the cuprates Anisotropic electron-phonon interaction in the cuprates

2004-03-31

arxiv.org/abs/cond-mat/0403766v2

Phys. Rev. Lett. 93, 117004 (2004)

Physics

Condensed Matter

Superconductivity

5 pages, 3 color figures (higher quality than originally submitted, minor editorial changes, to appear in Phys. Rev. Lett.)

Scientific paper

10.1103/PhysRevLett.93.117004

We explore manifestations of electron-phonon coupling on the electron spectral function for two phonon modes in the cuprates exhibiting strong renormalizations with temperature and doping. Applying simple symmetry considerations and kinematic constraints, we find that the out-of-plane, out-of-phase O buckling mode (B_1g) involves small momentum transfers and couples strongly to electronic states near the anti-node while the in-plane Cu-O breathing modes involve large momentum transfers and couples strongly to nodal electronic states. Band renormalization effects are found to be strongest in the superconducting state near the anti-node, in full agreement with angle-resolved photoemission spectroscopy (ARPES) data.

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