Electron-phonon interaction and antiferromagnetic correlations

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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.
4 pages and 5 figures

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Strongly Correlated Electrons, Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/135652

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0602606
 http://arxiv.org/abs/cond-mat/0602606
 Phys. Rev. Lett. 97, 046404 (2006)
 doi:10.1103/PhysRevLett.97.046404

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arXiv