2 papers
cond-mat.str-el2005
Perturbation theory for optical excitations in the one-dimensional extended Peierls--Hubbard model
Anja Grage, Florian Gebhard, Joerg Rissler
For the one-dimensional, extended Peierls--Hubbard model we calculate analytically the ground-state energy and the single-particle gap to second order in the Coulomb interaction fo…
cond-mat.str-el2003
Itineracy Effects on Spin Correlations in 1D Mott Insulators
M. J. Bhaseen, F. H. L. Essler, A. Grage
We consider spin correlations in the one dimensional half filled repulsive Hubbard model. For very large values of the on-site repulsion U the spin correlations are dominated by vi…