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	Binding energy of a hydrogenic donor impurity in a rectangular parallelepiped-shaped quantum dot: quantum confinement and stark effects
	Li, Shu-Shen; Xia, Jian-Bai
刊名	Journal of applied physics
	2007-05-01
卷号	101期号:9页码:6
ISSN号	0021-8979
DOI	10.1063/1.2734097
通讯作者	Li, shu-shen(sslee@red.semi.ac.cn)
英文摘要	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.
WOS关键词	OFF-CENTER DONOR ; WELL STRUCTURES ; ELECTRIC-FIELD ; STATES ; WIRES ; BOX
WOS研究方向	Physics
WOS类目	Physics, Applied
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000246567900055
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2427152
专题	半导体研究所
通讯作者	Li, Shu-Shen
作者单位	1.CCAST, World Lab, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Li, Shu-Shen,Xia, Jian-Bai. 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):6.
APA	Li, Shu-Shen,&Xia, Jian-Bai.(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),6.
MLA	Li, Shu-Shen,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):6.

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