Figure 4.

The amplitudes (a) $\Vert {\tilde{\mathit{\Phi }}}_{\tilde{\mathit{u}}}^{(1)}\Vert$, (b) $\Vert {\tilde{\mathit{\Phi }}}_{\tilde{\mathit{u}}}^{(2)}\Vert$, (c) $\Vert {\tilde{\mathit{\Gamma }}}_{\tilde{\mathit{u}}}^{(1)}\Vert$, (d) $\Vert {\tilde{\mathit{\Gamma }}}_{\tilde{\mathit{u}}}^{(2)}\Vert$, and the ratios (e) $\Vert {\tilde{\mathit{\Phi }}}_{\tilde{\mathit{u}}}^{(1)}\Vert /\Vert {\tilde{\mathit{\Gamma }}}_{\tilde{\mathit{u}}}^{(1)}\Vert$, (f ) $\Vert {\tilde{\mathit{\Phi }}}_{\tilde{\mathit{u}}}^{(2)}\Vert /\Vert {\tilde{\mathit{\Gamma }}}_{\tilde{\mathit{u}}}^{(2)}\Vert$ in the first Brillouin zone, calculated for the chiral lattice with $\tilde{\alpha }=0.5$. (Online version in colour.)