(color online) The V–E_f phase diagrams at different fillings: (a) n=1.75 and (b) n=1.917. There are three different phases. AF2 and AF1 are two antiferromagnetic phases with different forms of Fermi surface, and PKS stands for the paramagnetic Kondo singlet phase. The black line is the phase boundary between the AF2 and AF1 phases, while the red dotted line is the phase boundary between the AF1 phase and PKS phase.