A comparison of the transport properties of bilayer graphene, monolayer graphene, and two-dimensional electron gas

doi:10.1088/1674-1056/22/7/077201

Abstract We studied and compared the transport properties of charge carriers in the bilayer graphene, the monolayer graphene, and the conventional semiconductors (the two-dimensional electron gas (2DEG)). It is elucidated that the normal incidence transmission in the bilayer graphene is identical to that in the 2DEG but totally different from that in the monolayer graphene. However, the resonant peaks appear in the non-normal incidence transmission profile for a high barrier in the bilayer graphene, which do not occur in the 2DEG. Furthermore, there are tunneling and forbidden regions in the transmission spectrum for each material, and the division of the two regions has been given in the work. The tunneling region covers a wide range of the incident energy for the two graphene systems, but only exists under specific conditions for the 2DEG. The counterparts of the transmission in the conductance profile are also given for the three materials, which may be used as high-performance devices based on the bilayer graphene.

Keywords: bilayer graphene monolayer graphene two-dimensional electron gas (2DEG) transport properties

Received: 22 January 2013
Revised: 25 February 2013
Accepted manuscript online:

PACS:	72.80.Vp	(Electronic transport in graphene)
	73.23.Ad	(Ballistic transport)
	73.40.Gk	(Tunneling)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11104156), the Postdoctoral Science Foundation of China (Grant No. 2012M510405), the Independent Research and Development Fund of Tsinghua University, China (Grant No. 20121087948), and the Beijing Key Lab of Fine Ceramics Opening Fund, China (Grant No. 2012200110).

Corresponding Authors: Fang Chao
E-mail: fangchao@mail.tsinghua.edu.cn

Cite this article:

Sun Li-Feng (孙立风), Dong Li-Min (董利民), Wu Zhi-Fang (吴志芳), Fang Chao (房超) A comparison of the transport properties of bilayer graphene, monolayer graphene, and two-dimensional electron gas 2013 Chin. Phys. B 22 077201

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A comparison of the transport properties of bilayer graphene, monolayer graphene, and two-dimensional electron gas

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