Energy Band Gap Engineering of Graphene Nanoribbons

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.

7 pages including 4 figures

References in corpus (5)

• Electric Field Effect in Atomically Thin Carbon Films
• Energy Gaps in Graphene Nanoribbons
• Half-Metallic Graphene Nanoribbons
• Electronic States of Graphene Nanoribbons
• Peculiar Width Dependence of the Electronic Property of Carbon Nanoribbons

Cited by in corpus (404)

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