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

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

中国物理B ›› 2013, Vol. 22 ›› Issue (7): 77201-077201.doi: 10.1088/1674-1056/22/7/077201

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

孙立风^a, 董利民^b, 吴志芳^a, 房超^a

a Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;
b Beijing Key Laboratory of Fine Ceramics, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

收稿日期:2013-01-22 修回日期:2013-02-25 出版日期:2013-06-01 发布日期:2013-06-01
基金资助:
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).

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

Sun Li-Feng (孙立风)^a, Dong Li-Min (董利民)^b, Wu Zhi-Fang (吴志芳)^a, Fang Chao (房超)^a

a Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;
b Beijing Key Laboratory of Fine Ceramics, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

Received:2013-01-22 Revised:2013-02-25 Online:2013-06-01 Published:2013-06-01
Contact: Fang Chao E-mail:fangchao@mail.tsinghua.edu.cn
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: bilayer graphene, monolayer graphene, two-dimensional electron gas (2DEG), transport properties

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.

Key words: bilayer graphene, monolayer graphene, two-dimensional electron gas (2DEG), transport properties

中图分类号: (Electronic transport in graphene)

72.80.Vp

73.23.Ad (Ballistic transport) 73.40.Gk (Tunneling)

孙立风, 董利民, 吴志芳, 房超. A comparison of the transport properties of bilayer graphene, monolayer graphene, and two-dimensional electron gas[J]. 中国物理B, 2013, 22(7): 77201-077201.

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[J]. Chin. Phys. B, 2013, 22(7): 77201-077201.

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

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

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