Fig. 5.

Gibbs free energy $G$ versus crystal size $N_c$ for the free-energy landscapes in Fig. 4. Blue circles and lines correspond to checkerboard crystals; orange circles and lines correspond to stripe (A and B) or honeycomb (C) crystals. Free energies are calculated by integrating the Boltzmann weights in Fig. 4 D–F over $\mathrm{\Phi }$ at fixed $N_C$. Lines are quadratic fits of Eq. 2. $\stackrel{\sim }{\sigma }$ is the effective surface free-energy density and $\stackrel{\sim }{g}$ is the effective bulk free-energy density. Subscripts indicate the corresponding lattice structure. The binding free energies are $E_{\mathit{\text{AA}}}=E_{\mathit{\text{BB}}}=0,E_{\mathit{\text{AB}}}=7.0\hspace{0.17em}{k}_{\text{B}}T$ (A), $E_{\mathit{\text{AA}}}=0,E_{\mathit{\text{BB}}}=1.6\hspace{0.17em}{k}_{\text{B}}T,E_{\mathit{\text{AB}}}=7.0\hspace{0.17em}{k}_{\text{B}}T$ (B), and $E_{\mathit{\text{AA}}}=0,E_{\mathit{\text{BB}}}=3.5\hspace{0.17em}{k}_{\text{B}}T,E_{\mathit{\text{AB}}}=6.3\hspace{0.17em}{k}_{\text{B}}T$ (C).