Mott-Hubbard transition in infinite dimensions
arXiv:cond-mat/9810222 · doi:10.1103/PhysRevLett.82.1915
Abstract
We calculate the zero-temperature gap and quasiparticle weight of the half-filled Hubbard model with a random dispersion relation. After extrapolation to the thermodynamic limit, we obtain reliable bounds on these quantities for the Hubbard model in infinite dimensions. Our data indicate that the Mott-Hubbard transition is continuous, i.e., that the quasiparticle weight becomes zero at the same critical interaction strength at which the gap opens.
4 pages, RevTeX, 5 figures included with epsfig Final version for PRL, includes L=14 data