摘要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/(√3h) 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.
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/(√3h) 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.
HU Shi-Jie,DU Wei,ZHANG Gui-Ping,GAO Miao,LU Zhong-Yi,WANG Xiao-Qun**. Exact Results for Intrinsic Electronic Transport in Graphene[J]. 中国物理快报, 2012, 29(5): 57201-057201.
HU Shi-Jie,DU Wei,ZHANG Gui-Ping,GAO Miao,LU Zhong-Yi,WANG Xiao-Qun**. Exact Results for Intrinsic Electronic Transport in Graphene. Chin. Phys. Lett., 2012, 29(5): 57201-057201.
2012, Vol. 29 
