Charge-density waves in the Hubbard chain: evidence for 4k_F instability
Strongly Correlated Electrons
2009-10-31 v1
Abstract
Charge density waves in the Hubbard chain are studied by means of finite-temperature Quantum Monte Carlo simulations and Lanczos diagonalizations for the ground state. We present results both for the charge susceptibilities and for the charge structure factor at densities \rho=1/6 and 1/3; for \rho=1/2 (quarter filled) we only present results for the charge structure factor. The data are consistent with a 4k_F instability dominating over the 2k_F one, at least for sufficiently large values of the Coulomb repulsion, U. This can only be reconciled with the Luttinger liquid analyses if the amplitude of the 2k_F contribution vanishes above some U^*(\rho).
Keywords
Cite
@article{arxiv.cond-mat/0002031,
title = {Charge-density waves in the Hubbard chain: evidence for 4k_F instability},
author = {Thereza Paiva and Raimundo R dos Santos},
journal= {arXiv preprint arXiv:cond-mat/0002031},
year = {2009}
}
Comments
RevTeX, 4 two-column pages with 7 colour figures embedded in text