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
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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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