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题名: Electric current focusing efficiency in a graphene electric lens
作者: Mu, WH ;  Zhang, G ;  Tang, YQ ;  Wang, W ;  Ou-Yang, ZC
刊名: JOURNAL OF PHYSICS-CONDENSED MATTER
出版日期: 2011
卷号: 23, 期号:49, 页码:495302
关键词: P-N-JUNCTIONS ;  BILAYER GRAPHENE ;  BERRYS PHASE ;  ELECTRODYNAMICS ;  CARBON
学科分类: Physics
通讯作者: Mu, WH (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
部门归属: [Mu, Weihua; Ou-Yang, Zhongcan] Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China; [Mu, Weihua; Ou-Yang, Zhongcan] Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Zhang, Gang] Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China; [Zhang, Gang] Peking Univ, Dept Elect, Beijing 100871, Peoples R China; [Tang, Yunqing] Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China; [Wang, Wei] SUNY Albany, CNSE, Albany, NY 12203 USA; [Ou-Yang, Zhongcan] Tsinghua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
英文摘要: In the present work, we study theoretically the electron wave's focusing phenomenon in a single-layered graphene pn junction (PNJ) and obtain the electric current density distribution of graphene PNJ, which is in good agreement with the qualitative result in previous numerical calculations (Cheianov et al 2007 Science, 315, 1252). In addition, we find that, for a symmetric PNJ, 1/4 of total electric current radiated from the source electrode can be collected by the drain electrode. Furthermore, this ratio reduces to 3/16 in a symmetric graphene npn junction. Our results obtained by the present analytical method provide a general design rule for an electric lens based on negative refractory index systems.
资助者: National Science Foundation of China (NSFC) [11074259, 91027045]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000298142200004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14208
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Mu, WH,Zhang, G,Tang, YQ,et al. Electric current focusing efficiency in a graphene electric lens[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2011,23(49):495302.
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