Quasibound states in graphene quantum-dot nanostructures generated by concentric potential barrier rings

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	Quasibound states in graphene quantum-dot nanostructures generated by concentric potential barrier rings
	Jiang, ZT ; Yu, CL ; Dong, QL
刊名	CHINESE PHYSICS B
	2012
卷号	21 期号:2
关键词	KLEIN PARADOX
ISSN号	1674-1056
通讯作者	Jiang, ZT (reprint author), Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China.
中文摘要	We study the quasibound states in a graphene quantum-dot structure generated by the single-, double-, and triple-barrier electrostatic potentials. It is shown that the strongest quasibound states are mainly determined by the innermost barrier. Specifically, the positions of the quasibound states are determined by the barrier height, the number of the quasibound states is determined by the quantum-dot radius and the angular momentum, and the localization degree of the quasibound states is influenced by the width of the innermost barrier, as well as the outside barriers. Furthermore, according to the study on the double-and triple-barrier quantum dots, we find that an effective way to generate more quasibound states with even larger energy level spacings is to design a quantum dot defined by many concentric barriers with larger barrier-height differences. Last, we extend our results into the quantum dot of many barriers, which gives a complete picture about the formation of the quasibound states in the kind of graphene quantum dot created by many concentric potential barrier rings.
收录类别	SCI
资助信息	National Natural Science Foundation of China [10974015, 11074297]; Program for New Century Excellent Talents in University [NCET-08-0044]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/51780]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Jiang, ZT,Yu, CL,Dong, QL. Quasibound states in graphene quantum-dot nanostructures generated by concentric potential barrier rings[J]. CHINESE PHYSICS B,2012,21(2).
APA	Jiang, ZT,Yu, CL,&Dong, QL.(2012).Quasibound states in graphene quantum-dot nanostructures generated by concentric potential barrier rings.CHINESE PHYSICS B,21(2).
MLA	Jiang, ZT,et al."Quasibound states in graphene quantum-dot nanostructures generated by concentric potential barrier rings".CHINESE PHYSICS B 21.2(2012).