On the correllation effect in Peierls-Hubbard chains
Strongly Correlated Electrons
2009-11-07 v1
Abstract
We reexamine the dimerization, the charge and the spin gaps of a half-filled Peierls-Hubbard chain by means of the incremental expansion technique. Our numerical findings are in significant quantitative conflict with recently obtained results by M. Sugiura and Y. Suzumura [J. Phys. Soc. Jpn. v. 71 (2002) 697] based on a bosonization and a renormalization group method, especially with respect to the charge gap. Their approach seems to be valid only in the weakly correlated case.
Cite
@article{arxiv.cond-mat/0210349,
title = {On the correllation effect in Peierls-Hubbard chains},
author = {J. Malek and S. -L. Drechsler and S. Flach and E. Jeckelmann and K. Kladko},
journal= {arXiv preprint arXiv:cond-mat/0210349},
year = {2009}
}
Comments
7pages,4figures(6eps-files)