Plot of Quasiparticle weight for N degenerate bands
       under selected doping shows transition only at half-fill
       the rest are metallic states

def plot_dop(bands, int_max, dop, hund_cu, name):
    """Plot of Quasiparticle weight for N degenerate bands
       under selected doping shows transition only at half-fill
       the rest are metallic states"""
    data = ssplt.calc_z(bands, dop, np.arange(0, int_max, 0.1), hund_cu, name)
    ssplt.plot_curves_z(data, name)