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      Energy Band Gap Engineering of Graphene Nanoribbons

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          Abstract

          We investigate electronic transport in lithographically patterned graphene ribbon structures where the lateral confinement of charge carriers creates an energy gap near the charge neutrality point. Individual graphene layers are contacted with metal electrodes and patterned into ribbons of varying widths and different crystallographic orientations. The temperature dependent conductance measurements show larger energy gaps opening for narrower ribbons. The sizes of these energy gaps are investigated by measuring the conductance in the non-linear response regime at low temperatures. We find that the energy gap scales inversely with the ribbon width, thus demonstrating the ability to engineer the band gap of graphene nanostructures by lithographic processes.

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          Author and article information

          Journal
          21 February 2007
          Article
          10.1103/PhysRevLett.98.206805
          cond-mat/0702511
          4185c441-37b5-4da8-91ca-021255c44733
          History
          Custom metadata
          Phys. Rev. Lett, 98, 206805 (2007)
          7 pages including 4 figures
          cond-mat.mes-hall

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