Electronic correlations, electron-phonon interaction, and isotope effect in high-Tc cuprates
Superconductivity
2009-10-31 v1
Abstract
Using a large-N expansion we present and solve the linearized equation for the superconducting gap for a generalized t-J model which also contains phonons within a Holstein model. The leading Tc has d-wave symmetry with phonons giving a positive contribution to Tc. The corresponding isotope coefficient is very small at optimal doping and increases towards the classical value 1/2 with increasing dopings similar as in many cuprates.
Keywords
Cite
@article{arxiv.cond-mat/9904374,
title = {Electronic correlations, electron-phonon interaction, and isotope effect in high-Tc cuprates},
author = {A. Greco and R. Zeyher},
journal= {arXiv preprint arXiv:cond-mat/9904374},
year = {2009}
}
Comments
14 pages, 7 figures