Ground state phases of the Half-Filled One-Dimensional Extended Hubbard Model
Strongly Correlated Electrons
2009-11-10 v1
Abstract
Using quantum Monte Carlo simulations, results of a strong-coupling expansion, and Luttinger liquid theory, we determine quantitatively the ground state phase diagram of the one-dimensional extended Hubbard model with on-site and nearest-neighbor repulsions U and V. We show that spin frustration stabilizes a bond-ordered (dimerized) state for U appr. V/2 up to U/t appr. 9, where t is the nearest-neighbor hopping. The transition from the dimerized state to the staggered charge-density-wave state for large V/U is continuous for U up to appr. 5.5 and first-order for higher U.
Cite
@article{arxiv.cond-mat/0401472,
title = {Ground state phases of the Half-Filled One-Dimensional Extended Hubbard Model},
author = {A. W. Sandvik and L. Balents and D. K. Campbell},
journal= {arXiv preprint arXiv:cond-mat/0401472},
year = {2009}
}
Comments
4 pages, 4 figures