Figure 3

LDA and vdW calculated charge density difference for bilayer (a) graphene, (b) MoS2 and (c) Bi2Se3 at the equilibrium distance.
The charge accumulation and depletion is denoted by the yellow and blue color, respectively.
LDA and vdW calculated charge density difference for bilayer (a) graphene, (b) MoS2 and (c) Bi2Se3 at the equilibrium distance.
The charge accumulation and depletion is denoted by the yellow and blue color, respectively.