Vanishing spectral weight in a one-hole-doped antiferromagnet: A rigorous result
arXiv:cond-mat/9505124
Abstract
By explicitly tracking the Marshall sign, a phase string induced by hopping is revealed in the one-hole-doped model. It is rigorously shown that such a phase string cannot be eliminated through low-lying spin excitations, and it either causes the spectral weight , or leads to the localization of the doped hole. Implications for finite doping are also discussed.
11 pages, Revtex, no figures; submitted to PRL