  The recent experiments revealed a remarkable possibility for the absence of
the disparity between the phase diagrams of the electron- and hole-doped
cuprate superconductors, while such an aspect should be also reflected in the
dressing of the electrons. Here the phase diagram of the electron-doped cuprate
superconductors and the related exotic features of the anisotropic dressing of
the electrons are studied based on the kinetic-energy driven superconductivity.
It is shown that although the optimized Tc in the electron-doped side is much
smaller than that in the hole-doped case, the electron- and hole-doped cuprate
superconductors rather resemble each other in the doping range of the
superconducting dome, indicating an absence of the disparity between the phase
diagrams of the electron- and hole-doped cuprate superconductors. In
particular, the anisotropic dressing of the electrons due to the strong
electron's coupling to a strongly dispersive spin excitation leads to that the
electron Fermi surface is truncated to form the disconnected Fermi arcs
centered around the nodal region. Concomitantly, the dip in the peak-dip-hump
structure of the quasiparticle excitation spectrum is directly associated with
the corresponding peak in the quasiparticle scattering rate, while the
dispersion kink is always accompanied by the corresponding inflection point in
the total self-energy, as the dip in the peak-dip-hump structure and dispersion
kink in the hole-doped counterparts. The theory also predicts that both the
normal and anomalous self-energies exhibit the well-pronounced low-energy
peak-structures.
