Fig. 1.

The honeycomb lattice of the Haldane model. The empty dots belong to ${\mathrm{\Lambda }}_L^{\text{A}}$, while the black dots belong to ${\mathrm{\Lambda }}_L^{\text{B}}$. The oval encircles the two sites of the fundamental cell, labeled by the position of the empty dot, i.e., of the site of the A sublattice. The nearest neighbor vectors ${\overrightarrow{\delta }}_i$, are shown explicitly, together with the next-to-nearest neighbor vectors ${\overrightarrow{\gamma }}_i$, and the two basis vectors ${\overrightarrow{\ell }}_{1,2}$ of ${\mathrm{\Lambda }}_L$