Binding energy of a hydrogenic donor impurity in a rectangular parallelepiped-shaped quantum dot: Quantum confinement and Stark effects

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	Binding energy of a hydrogenic donor impurity in a rectangular parallelepiped-shaped quantum dot: Quantum confinement and Stark effects
	Li SS (Li Shu-Shen) ; Xia JB (Xia Jian-Bai)
刊名	journal of applied physics
	2007
卷号	101 期号:9 页码:art.no.093716
关键词	OFF-CENTER DONOR
ISSN号	issn: 0021-8979
通讯作者	li, ss, ccast, world lab, pob 8730, beijing 100080, peoples r china. 电子邮箱地址: sslee@red.semi.ac.cn
中文摘要	we calculate the binding energy of a hydrogenic donor impurity in a rectangular parallelepiped-shaped quantum dot (qd) in the framework of effective-mass envelope-function theory using the plane wave basis. the variation of the binding energy with edge length, position of the impurity, and external electric field is studied in detail. a finite potential model is adopted in our calculations. compared with the infinite potential model [c. i. mendoza , phys. rev. b 71, 075330 (2005)], the following results are found: (1) if the impurity is located in the interior of the qd, our results give a smaller binding energy than the infinite potential model; (2) the binding energies are more sensitively dependent on the applied electric field in the finite potential model; (3) the infinite potential model cannot give correct results for a small qd edge length for any location of the impurity in the qd; (4) some degeneracy is lifted when the dot is no longer cubic. (c) 2007 american institute of physics.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-03-29
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/9450]
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	Li SS ,Xia JB . Binding energy of a hydrogenic donor impurity in a rectangular parallelepiped-shaped quantum dot: Quantum confinement and Stark effects[J]. journal of applied physics,2007,101(9):art.no.093716.
APA	Li SS ,&Xia JB .(2007).Binding energy of a hydrogenic donor impurity in a rectangular parallelepiped-shaped quantum dot: Quantum confinement and Stark effects.journal of applied physics,101(9),art.no.093716.
MLA	Li SS ,et al."Binding energy of a hydrogenic donor impurity in a rectangular parallelepiped-shaped quantum dot: Quantum confinement and Stark effects".journal of applied physics 101.9(2007):art.no.093716.