Graphene atomic film transistor with gate-tunable band-gap

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We have realized a practical wide band gap in bilayer graphene. The gap was induced by an electric field applied by dual-gate sandwiching the bilayer graphene. A self-assembled gate insulator enabled us to apply a large electric field which enhanced the band gap. The wide band gap allowed for operation of a logic gate composed of bilayer graphene transistors. These results predict that graphene electronics will possibly be realized as emerging transistors with an atomically thin semiconductor.