Electron-phonon interaction and antiferromagnetic correlations

Details Electron-phonon interaction and antiferromagnetic correlations Electron-phonon interaction and antiferromagnetic correlations

2006-02-26

arxiv.org/abs/cond-mat/0602606v1

Phys. Rev. Lett. 97, 046404 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages and 5 figures

Scientific paper

10.1103/PhysRevLett.97.046404

We study effects of the Coulomb repulsion on the electron-phonon interaction (EPI) in a model of cuprates at zero and finite doping. We find that antiferromagnetic correlations strongly enhance EPI effects on the electron Green's function with respect to the paramagnetic correlated system, but the net effect of the Coulomb interaction is a moderate suppression of the EPI. Doping leads to additional suppression, due to reduced antiferromagnetic correlations. In contrast, the Coulomb interaction strongly suppresses EPI effects on phonons, but the suppression weakens with doping.

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