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A controllable valley polarization in Graphene
LIU Yang 1,SONG Juntao 2 *,LI Yuxian 2,LIU Ying 2,SUN Qingfeng 3
1.Department of Physics and Hebei Advanced Thin Film Laboratory,Hebei Normal University, Shijiazhuang 050024
2.Department of Physics and Hebei Advanced Thin Film Laboratory,Hebei Normal University,Shijiazhuang 050024
3.Beijing National Lab for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 10080
*Correspondence author
#Submitted by
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Funding: none
Opened online: 2 April 2013
Accepted by: none
Citation: LIU Yang,SONG Juntao,LI Yuxian.A controllable valley polarization in Graphene[OL]. [ 2 April 2013] http://en.paper.edu.cn/en_releasepaper/content/4533066
 
 
The electron transport of different conical valleys is investigated in graphene with extended line-defects. Intriguingly, the electron with a definite incident angle can be completely modulated into one conical valley by a resonator which consists of several paralleling line-defects. The related incident angle can be controlled easily by tuning the parameters of the resonator. Therefore, a controllable 100% valley polarization, as well as the detection of the valley polarization, can be realized conveniently by tuning the number of line-defects and the distance between two nearest neighbouring line-defects. This fascinating finding opens a way to realize the valley polarization by line-defects. With the advancement of experimental technologies, this resonator is promising to be realized and thus plays a key role in graphene valleytronics.
Keywords:valley polarization; line-defects; graphene
 
 
 

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