Figure 3
Band structures of free-standing. (a) Germanene calculated with a 4 × 4 supercell, (b) MoS2 monolayer calculated with a 5 × 5 supercell, and (c) silicene calculated with a 4 × 4 supercell. (d, e) The band structures of Ger/MoS2 and Sil/MoS2 superlattices, respectively. The contributions from the germanene/silicene and MoS2 layers to the band structures of the superlattices are shown with blue and green dots, respectively. The detailed band structures in the vicinity of the opened band gap are inserted. Red dashed lines represent the Fermi level.