Correlation Effects in a One-Dimensional Quarter-Filled Electron System with Repulsive Interactions
Strongly Correlated Electrons
2009-10-31 v1
Abstract
A one-dimensional electron system at quarter-filling has been examined by applying the renormalization group method to a bosonized model with on-site (U) and nearest-neighbor (V) repulsive interactions. By evaluating both normal scattering and Umklapp scattering perturbatively, we obtain a phase diagram in which a metallic state with a 2k_F spin density wave (k_F is the Fermi wave number) moves into an insulating state with charge disproportionation of a 4k_F charge density wave with an increase in both U and V. The effect of the next-nearest-neighbor repulsion is also discussed.
Cite
@article{arxiv.cond-mat/0001450,
title = {Correlation Effects in a One-Dimensional Quarter-Filled Electron System with Repulsive Interactions},
author = {Hideo Yoshioka and Masahisa Tsuchiizu and Yoshikazu Suzumura},
journal= {arXiv preprint arXiv:cond-mat/0001450},
year = {2009}
}
Comments
4 pages, 2 figures, to be published in J. Phys. Soc. Jpn. 69 (2000) No. 3