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
孙立风a, 董利民b, 吴志芳a, 房超a
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
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.
中图分类号: (Electronic transport in graphene)