Quantum Hall Transport across Monolayer-Bilayer Boundary in Graphene

被引:7
|
作者
Tsukuda, A. [1 ]
Okunaga, H. [1 ]
Nakahara, D. [1 ]
Uchida, K. [1 ]
Konoike, T. [1 ]
Osada, T. [1 ]
机构
[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
关键词
D O I
10.1088/1742-6596/334/1/012038
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Magnetotransport across monolayer-bilayer boundary on a graphene piece has been studied in the quantum Hall state. The edge channel transport in monolayer-bilayer junctions has been discussed based on the Landauer-Buttiker picture following p-n bipolar junctions of monolayer graphene. We considered two extreme cases of transmission from input edge channels to output channels at the junction, the maximum transmission model and the full-mixing model. They give different two-terminal conductance as a function of carrier filling. We measured the two-terminal conductance in monolayer-bilayer junction devices, and the measured conductance agreed better with the full-mixing model. This result suggests that edge channels of monolayer and bilayer regions are almost fully mixed up at the monolayer-bilayer boundary.
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页数:5
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