| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Resonance Transport of Graphene Nanoribbon T-Shaped Junctions |
KONG Xiao-Lan, XIONG Yong-Jian |
| Key Laboratory of Nano Materials of Ningbo, Department ofPhysics, Ningbo University, Ningbo 315211 |
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| Cite this article: |
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KONG Xiao-Lan, XIONG Yong-Jian 2010 Chin. Phys. Lett. 27 047202 |
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Abstract We investigate the transport properties of T-shaped junctions composed of armchair graphene nanoribbons of different widths. Three types of junction geometries are considered. The junction conductance strongly depends on the atomic features of the junction geometry. When the shoulders of the junction have zigzag type edges, sharp conductance resonances usually appear in the low energy region around the Dirac point, and a conductance gap emerges. When the shoulders of the junction have armchair type edges, the conductance resonance behavior is weakened significantly, and the metal-metal-metal junction structures show semimetallic behaviors. The contact resistance also changes notably due to the various interface geometries of the junction.
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| Keywords:
72.10.-d
73.23.-b
73.23.Ad
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Received: 24 August 2009
Published: 27 March 2010
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| PACS: |
72.10.-d
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(Theory of electronic transport; scattering mechanisms)
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73.23.-b
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(Electronic transport in mesoscopic systems)
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73.23.Ad
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(Ballistic transport)
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