ARPES Spectra of the Hubbard model
Abstract
We discuss spectra calculated for the 2D Hubbard model in the intermediate coupling regime with the dynamical cluster approximation, which is a non-perturbative approach. We find a crossover from a normal Fermi liquid with a Fermi surface closed around the Brillouin zone center at large doping to a non-Fermi liquid for small doping. The crossover is signalled by a splitting of the Fermi surface around the point of the 2D Brillouin zone, which eventually leads to a hole-like Fermi surface closed around the point M. The topology of the Fermi surface at low doping indicates a violation of Luttinger's theorem. We discuss different ways of presenting the spectral data to extract information about the Fermi surface. A comparison to recent experiments will be presented.
Cite
@article{arxiv.cond-mat/0111368,
title = {ARPES Spectra of the Hubbard model},
author = {Th. A. Maier and Th. Pruschke and M. Jarrell},
journal= {arXiv preprint arXiv:cond-mat/0111368},
year = {2009}
}
Comments
8 pages, 7 color figures, uses RevTeX 4