| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Exact Results for Intrinsic Electronic Transport in Graphene |
| HU Shi-Jie1, 2,DU Wei1,ZHANG Gui-Ping1,GAO Miao1,LU Zhong-Yi1,WANG Xiao-Qun1** |
1Department of Physics, Renmin University of China, Beijing 100872
2Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 |
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| Cite this article: |
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HU Shi-Jie, DU Wei, ZHANG Gui-Ping et al 2012 Chin. Phys. Lett. 29 057201 |
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Abstract We present exact results for the electronic transport properties of graphene sheets connected to two metallic electrodes. Our results obtained by transfer-matrix methods are valid for all sheet widths and lengths. In the limit of the large width-to-length ratio relevant to recent experiments, we find a Dirac-point conductivity of 2e2/(√3
h) and a sub−Poissonian Fano factor of 2-3√3/π≃0.346 for armchair graphene; for the zigzag geometry they are respectively 0 and 1. Our results reflect essential effects from both the topology of graphene and the electronic structure of the leads, giving a complete microscopic understanding of the unique intrinsic transport in graphene.
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| Keywords:
72.80.Vp
73.22.Pr
74.25.F-
73.40.Sx
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Received: 14 March 2012
Published: 30 April 2012
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| PACS: |
72.80.Vp
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(Electronic transport in graphene)
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73.22.Pr
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(Electronic structure of graphene)
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74.25.F-
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(Transport properties)
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73.40.Sx
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(Metal-semiconductor-metal structures)
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