Phonon spectral function for an interacting electron-phonon system
Strongly Correlated Electrons
2009-10-31 v1
Abstract
Using exact diagonalzation techniques, we study a model of interacting electrons and phonons. The spectral width of the phonons is found to be reduced as the Coulomb interaction U is increased. For a system with two modes per site, we find a transfer of coupling strength from the upper to the lower mode. This transfer is reduced as U is increased. These results give a qualitative explanation of differences between Raman and photoemission estimates of the electron-phonon coupling constants for A3C60 (A= K, Rb).
Cite
@article{arxiv.cond-mat/9910299,
title = {Phonon spectral function for an interacting electron-phonon system},
author = {J. E. Han and O. Gunnarsson},
journal= {arXiv preprint arXiv:cond-mat/9910299},
year = {2009}
}
Comments
4 pages, RevTeX, 2 eps figure