Figure 1
From: Quasiparticle and optical properties of strained stanene and stanane

(a) Top view of the optimized atomic structure of stanene. The four-atom unit cell with perpendicular basis vectors is delineated by red dashed lines. (b) Top views of the stanene lattice under strain along ZZ, EQ and AC directions. Side views of the atomic structures of (c) stanene and (d) stanane. Blue and green balls represent Sn and H atoms, respectively.