Superlattice Structures of Graphene based Nanoribbons

Details Superlattice Structures of Graphene based Nanoribbons Superlattice Structures of Graphene based Nanoribbons

2007-11-15

arxiv.org/abs/0711.2414v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

amended version

Scientific paper

10.1103/PhysRevB.78.245402

Based on first-principles calculations we predict that periodically repeated junctions of armchair graphene nanoribbons of different widths form superlattice structures. In these superlattice heterostructures the width and the energy gap are modulated in real space and specific states are confined in certain segments. Orientation of constituent nanoribbons, their width and length, the symmetry of the junction are the structural parameters to engineer electronic properties of these quantum structures. Not only the size modulation, but also composition modulation, such as periodically repeated, commensurate heterojunctions of BN and graphene honeycomb nanoribbons result in a multiple quantum well structure. We showed that these graphene based quantum structures can introduce novel concepts to design nanodevices.

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