Fig. 3.

The imaginary part of the fermion self-energy for two values of parameters $\alpha =1.5,V=0.5,\mu =1.0$ (Top row) and $\alpha =1.0,V=1.0,\mu =0.5$ (Bottom row), for various temperatures and with the nominal Fermi momenta ${\overrightarrow{k}}_d$ and ${\overrightarrow{k}}_h$ along the $(0,0)-(\pi ,\pi )$ and $(0,\pi )-(\pi ,\pi )$ directions, respectively. Data are shown for a $20\times 20$ system both near $h_c$ (Left column) and far in the symmetric phase (Right column). (Top Left) Data points below $T_c$ are connected by dashed lines.