Fig. 6

Electronic structures of the a monolayer graphene, b monolayer stanene, and c bilayer \( \mathrm{S}\mathrm{n}(3)/\mathrm{G}\left(\sqrt{31}\right) \). The red line represents the Fermi level, which set to be zero. The relative contribution of stanene is coded by color: blue (red) corresponds to the state originating only from stanene (graphene). The substrate-induced gap is 67 meV for Sn (Γ) and 3 meV for graphene (K)