Nonadiabatic Contribution to the Quasiparticle Self-Energy in Systems with Strong Electron-Phonon Interaction
Superconductivity
2009-10-31 v1 Strongly Correlated Electrons
Abstract
We investigate effects of a nonadiabatic electron-phonon(boson) interaction on the quasiparticle self-energy in the lowest order in the coupling constant. Existing approaches either overestimate, or underestimate these effects because of different approximations for momentum and frequency dependences of the vertex corrections. The connection between the nonadiabaticity and a possible instability of the interacting Fermi system is discussed as well.
Keywords
Cite
@article{arxiv.cond-mat/0007189,
title = {Nonadiabatic Contribution to the Quasiparticle Self-Energy in Systems with Strong Electron-Phonon Interaction},
author = {O. V. Danylenko and O. V. Dolgov},
journal= {arXiv preprint arXiv:cond-mat/0007189},
year = {2009}
}
Comments
20 pages, 4 figures