Figure 5
From: Tunable band gap in few-layer graphene by surface adsorption
(a) Band gaps of graphene in metal-adsorbed ABC-stacked trilayer graphene as a function of the adsorption coverage. (b) Schematic illustration of equivalent vertical electric field induced by metal single-side adsorption. E represents the electric field between metal and graphene and E1 and E2 represent the electric field between the graphene layers. (c) Charge transfer density in metal-adsorbed ABC-stacked trilayer graphene as a function of the adsorption coverage. (d) Band gaps of graphene in metal-adsorbed ABC-stacked trilayer graphene as a function of the charge transfer density. There is an approximately linear relation between the band gap and the charge transfer density.
