Spectral microscopic mechanisms and quantum phase transitions in a 1D correlated problem
Abstract
In this paper we study the dominant microscopic processes that generate nearly the whole one-electron removal and addition spectral weight of the one-dimensional Hubbard model for all values of the on-site repulsion . We find that for the doped Mott-Hubbard insulator there is a competition between the microscopic processes that generate the one-electron upper-Hubbard band spectral-weight distributions of the Mott-Hubbard insulating phase and finite-doping-concentration metallic phase, respectively. The spectral-weight distributions generated by the non-perturbative processes studied here are shown elsewhere to agree quantitatively for the whole momentum and energy bandwidth with the peak dispersions observed by angle-resolved photoelectron spectroscopy in quasi-one-dimensional compounds.
Keywords
Cite
@article{arxiv.cond-mat/0508209,
title = {Spectral microscopic mechanisms and quantum phase transitions in a 1D correlated problem},
author = {J. M. P. Carmelo and K. Penc},
journal= {arXiv preprint arXiv:cond-mat/0508209},
year = {2009}
}
Comments
18 pages, 2 figures