Figure 4.

R and AR slices through $f^{\left[\text{ann}.\right]}\left({\varphi }^{\text{t}},{\varphi }^{\text{b}}\right)$ for the sequence of parameter points indicated by the green dots in Fig. 5b. Solid and open circles mark minima in the R and AR directions, respectively. We label, for a bilayer of overall composition $\left(0.5,0.5\right)$, whether equilibrium coexistence is R-R or AR-AR, and which modes (R or AR) the initially uniform homogeneous state is unstable to.