Second-order electronic correlation effects in a one-dimensional metal
Abstract
The Pariser-Parr-Pople (PPP) model of a single-band one-dimensional (1D) metal is studied at the Hartree-Fock level, and by using the second-order perturbation theory of the electronic correlation. The PPP model provides an extension of the Hubbard model by properly accounting for the long-range character of the electron-electron repulsion. Both finite and infinite version of the 1D-metal model are considered within the PPP and Hubbard approximations. Calculated are the second-order electronic-correlation corrections to the total energy, and to the electronic-energy bands. Our results for the PPP model of 1D metal show qualitative similarity to the coupled-cluster results for the 3D electron-gas model. The picture of the 1D-metal model that emerges from the present study provides a support for the hypothesis that the normal metallic state of the 1D metal is different from the ground state.
Keywords
Cite
@article{arxiv.cond-mat/0411614,
title = {Second-order electronic correlation effects in a one-dimensional metal},
author = {Rafał Podeszwa and Leszek Z. Stolarczyk},
journal= {arXiv preprint arXiv:cond-mat/0411614},
year = {2009}
}
Comments
21 pages, 16 figures; v2: small correction in title, added 3 references, extended and reformulated a few paragraphs (detailed information at the end of .tex file); added color to figures