%0 Journal Article
%T Spectral weight function for the half-filled Hubbard model: a singular value decomposition approach
%A C. E. Creffield
%A E. G. Klepfish
%A E. R. Pike
%A Sarben Sarkar
%J Physics
%D 1995
%I arXiv
%R 10.1103/PhysRevLett.75.517
%X The singular value decomposition technique is used to reconstruct the electronic spectral weight function for a half-filled Hubbard model with on-site repulsion $U=4t$ from Quantum Monte Carlo data. A two-band structure for the single-particle excitation spectrum is found to persist as the lattice size exceeds the spin-spin correlation length. The observed bands are flat in the vicinity of the $(0,\pi),(\pi,0)$ points in the Brillouin zone, in accordance with experimental data for high-temperature superconducting compounds.
%U http://arxiv.org/abs/cond-mat/9501119v1