Figure 2
From: Enhancement of electron-hole superfluidity in double few-layer graphene
(a) Schematic illustration of two few-layer graphene sheets separated by a thin barrier of h-BN layers. The electrons and holes are induced in the separately electrically contacted upper and lower graphene sheets by top and back gates. (b) Sketch of the energy bands of gapped bilayer N = 2, trilayer N = 3 and quadlayer N = 4 graphene. The yellow region around the bottom of the conduction band indicates the range of values of the chemical potential μ for our range of carrier densities.
