Figure 2
From: Prediction of Quantum Anomalous Hall Insulator in half-fluorinated GaBi Honeycomb

Total energy per unit cell as a function of lattice constant and the associated phases for (a) F on Ga [same as BiGa-F in Fig. 1(b)] and (b) F on Bi [same as GaBi-F in Fig. 1(a)]. Planar, inversely buckled and buckled structures are labeled as hollow green circles, red squares and blue triangles, respectively. (c–f) Band structures for various values of the buckling distance δ, showing the transition from the buckled to the planar honeycomb. px-orbital contribution is shown (solid green circles).