The Peierls-Hubbard model at weak coupling
Strongly Correlated Electrons
2009-11-11 v2
Abstract
We investigate the Peierls transition in the one-dimensional Peierls-Hubbard model at half filling in the adiabatic approximation for the lattice. Depending on the value of the electron-lattice coupling constant g the equilibrium dimerization can be either enhanced or suppressed by the Hubbard interaction U. Applying second order perturbation theory we determine the critical value g_c = 0.689348 below which the Hubbard interaction enhances the dimerization.
Cite
@article{arxiv.cond-mat/0504078,
title = {The Peierls-Hubbard model at weak coupling},
author = {Michael Dzierzawa and Carmen Mocanu},
journal= {arXiv preprint arXiv:cond-mat/0504078},
year = {2009}
}
Comments
8 pages, 4 figures