Hole photoproduction in insulating copper oxide
Hole photoproduction in insulating copper oxide
To explain the experimental spectra for angle-resolved photoemission we consider a modified $t\ensuremath{-}J$ model. The modified model includes next-nearest ${(t}^{\ensuremath{'}})$ and next-next-nearest ${(t}^{\ensuremath{'}\ensuremath{'}})$ hopping as well as corrections due to ``virtual'' charge fluctuations to the spectral weights. A Dyson equation that relates the single-hole Green's functions for a given pseudospin …