Tuning of energy levels and optical properties of graphene quantum dots

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	Tuning of energy levels and optical properties of graphene quantum dots
	Zhang ZZ ; Chang K
刊名	physical review b
	2008
卷号	77 期号:23 页码:art. no. 235411
关键词	BLOCH ELECTRONS
ISSN号	1098-0121
通讯作者	chang, k, chinese acad sci, inst semicond, sklsm, pob 912, beijing 100083, peoples r china. 电子邮箱地址: kchang@red.semi.ac.cn
中文摘要	we investigate theoretically the magnetic levels and optical properties of zigzag- and armchair-edged hexagonal graphene quantum dots (gqds) utilizing the tight-binding method. a bound edge state at zero energy appears for the zigzag gqds in the absence of a magnetic field. the magnetic levels of gqds exhibit a hofstadter-butterfly spectrum and approach the landau levels of two-dimensional graphene as the magnetic field increases. the optical properties are tuned by the size, the type of the edge, and the external magnetic field.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-03-08
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/6574]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Zhang ZZ,Chang K. Tuning of energy levels and optical properties of graphene quantum dots[J]. physical review b,2008,77(23):art. no. 235411.
APA	Zhang ZZ,&Chang K.(2008).Tuning of energy levels and optical properties of graphene quantum dots.physical review b,77(23),art. no. 235411.
MLA	Zhang ZZ,et al."Tuning of energy levels and optical properties of graphene quantum dots".physical review b 77.23(2008):art. no. 235411.