Figure 14.

Density plot for the mean-field phase transition critical temperature $T_c(n_A,n_B,\alpha ,\Delta ,D)$ versus the concentrations $n_A$ and $n_B$ of A and B excitons, respectively, for chosen parameter $\alpha =0.6$ and gap $\Delta =0.5ħv_F/a$, at the fixed interlayer separation $D=25\mathrm{nm}$.