Polarization Induced Switching Effect in Graphene Nanoribbon Edge-Defect Junction

Details Polarization Induced Switching Effect in Graphene Nanoribbon Edge-Defect Junction Polarization Induced Switching Effect in Graphene Nanoribbon Edge-Defect Junction

2009-10-27

arxiv.org/abs/0910.5056v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

18 pages, 8 figures

Scientific paper

With nonequilibrium Green's function approach combined with density functional theory, we perform an ab initio calculation to investigate transport properties of graphene nanoribbon junctions self-consistently. Tight-binding approximation is applied to model the zigzag graphene nanoribbon (ZGNR) electrodes, and its validity is confirmed by comparison with GAUSSIAN03 PBC calculation of the same system. The origin of abnormal jump points usually appearing in the transmission spectrum is explained with the detailed tight-binding ZGNR band structure. Transport property of an edge defect ZGNR junction is investigated, and the tunable tunneling current can be sensitively controlled by transverse electric fields.

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