On the optical conductivity of Electron-Doped Cuprates I: Mott Physics
  The doping and temperature dependent conductivity of electron-doped cuprates is analysed. The variation of kinetic energy with doping is shown to imply that the materials are approximately as strongly correlated as the hole-doped materials. The optical spectrum is fit to a quasiparticle scattering model; while the model fits the optical data well, gross inconsistencies with photoemission data are found, implying the presence of a large, strongly doping dependent Landau parameter. 
A. J. Millis, A. Zimmers, R. P. S. M. Lobo, N. Bontemps