The binding energy of a hydrogenic impurity in self-assembled double quantum dots

被引：0
|
作者：
张红 [1 ]
王学 [1 ]
赵剑锋 [1 ]
刘建军 [2 ]
机构：
[1] College of Science,Hebei University of Engineering
[2] College of Physical Science and Information Engineering,Hebei Normal University
来源：
Chinese Physics B | 2011年 / 20卷 / 12期
基金：
中国国家自然科学基金;
关键词：
hydrogenic impurity; double quantum dots; binding energy; magnetic field;
D O I：
暂无
中图分类号：
O471.1 [半导体量子理论];
学科分类号：
070205 ; 080501 ; 0809 ; 080903 ;
摘要：
The binding energy of a hydrogenic impurity in self-assembled double quantum dots is calculated via the finite-difference method.The variation in binding energy with donor position,structure parameters and external magnetic field is studied in detail.The results found are:(i) the binding energy has a complex behaviour due to coupling between the two dots;(ii) the binding energy is much larger when the donor is placed in the centre of one dot than in other positions;and (iii) the external magnetic field has different effects on the binding energy for different quantum-dot sizes or lateral confinements.
引用
收藏
页码：377 / 381
页数：5
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