Mott Transitions in the 2D Half-Filled Hubbard Model: Correlator Projection Method with Projective Dynamical Mean-Field Approximation
Strongly Correlated Electrons
2009-11-07 v2
Abstract
The 2D half-filled Hubbard model is studied by a nonperturbative analytic theory of correlator projection. The original dynamical mean-field approximation (DMFA) is reproduced at the first-order projection and then improved by systematic inclusion of spatial correlations at higher orders. A geometrical frustration induces a first-order Mott transition surface with a finite-temperature critical end curve. Growth of antiferromagnetic correlations gives single-particle spectra strongly modified from DMFA with shadow bands and flat dispersions observed in high-T_c cuprates.
Cite
@article{arxiv.cond-mat/0206531,
title = {Mott Transitions in the 2D Half-Filled Hubbard Model: Correlator Projection Method with Projective Dynamical Mean-Field Approximation},
author = {Shigeki Onoda and Masatoshi Imada},
journal= {arXiv preprint arXiv:cond-mat/0206531},
year = {2009}
}
Comments
4 pages, including 6 figures, revisions including new figures