Neel order, ring exchange and charge fluctuations in the half-filled Hubbard model

J. -Y. P. Delannoy, M. J. P. Gingras, P. C. W. Holdsworth +1

We investigate the ground state properties of the two dimensional half-filled one band Hubbard model in the strong (large-U) to intermediate coupling limit ({\it i.e.} away from th…