Phase diagrams of half-filled 1D and 2D extended Hubbard model within COM
Strongly Correlated Electrons
2009-11-11 v1
Abstract
The half-filled extended Hubbard model, in one and two dimensions, is studied by means of the 2-pole approximation within the Composite Operator Method with the aim at improving the possibilities to describe some of the experimental features observed for quasi-1D organic superconductors and Cu-O planes of cuprates. The phase diagrams (- and -) are analyzed with respect to the paramagnetic metal - paramagnetic insulator - charge ordered phase transitions. The relevant features of the diagrams (rank of the phase transitions, critical points, reentrant behavior) are discussed in detail.
Keywords
Cite
@article{arxiv.cond-mat/0605132,
title = {Phase diagrams of half-filled 1D and 2D extended Hubbard model within COM},
author = {Adolfo Avella and Ferdinando Mancini},
journal= {arXiv preprint arXiv:cond-mat/0605132},
year = {2009}
}