Figure 2 | Scientific Reports

Figure 2

From: Understanding the origin of band gap formation in graphene on metals: graphene on Cu/Ir(111)

Figure 2

Electronic structure of graphene/Ir(111) and graphene/Cu/Ir(111) measured by ARPES.

(a,b) ARPES intensity maps for the graphene layer on Ir(111) and Cu/Ir(111), respectively, acquired along the Γ − K direction of the BZ of graphene with a photon energy = 65 eV. The inset in (a) shows a graphene-derived BZ with the corresponding directions. (c) ARPES intensity maps for graphene/Cu/Ir(111) obtained in the vicinity of the K point along Γ − K (left) and perpendicular to it (right) directions of BZ of graphene with photon energy = 40.81 eV. (d) The corresponding constant energy cuts extracted from the complete 3D ARPES data set for the graphene/Cu/Ir(111) system.

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