Electron-phonon interaction and antiferromagnetic correlations
Strongly Correlated Electrons
2007-08-07 v1 Materials Science
Abstract
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.
Cite
@article{arxiv.cond-mat/0602606,
title = {Electron-phonon interaction and antiferromagnetic correlations},
author = {G. Sangiovanni and O. Gunnarsson and E. Koch and C. Castellani and M. Capone},
journal= {arXiv preprint arXiv:cond-mat/0602606},
year = {2007}
}
Comments
4 pages and 5 figures