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.