Figure 5
From: Quantum spin Hall insulator in halogenated arsenene films with sizable energy gaps
Atomic structures of ribbons with (a) zigzag and (b) armchair edges for F-arsenene. The green dotted lines represent the unit cell of ribbons and the red solid lines indicate the atoms on different edges. Corresponding band structures of ribbons with (c) zigzag and (d) armchair edges with X = π/L where L is the width of nanoribbon.
