北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2006, Vol. 29 ›› Issue (2): 74-77.doi: 10.13190/jbupt.200602.74.131

• 论文 • 上一篇    下一篇

运用解析方法分析量子点的应力应变分布

封强,俞重远,刘玉敏,杨红波,黄永箴   

  1. 北京邮电大学 理学院
  • 出版日期:2006-04-28 发布日期:2006-04-28

The Analysis of Strain Distributions in Quantum Dot Structures Using an Analytical Approach

FENG Qiang, YU Zhong-yuan, LIU Yu-min, YANG Hong-bo, HUANG Yong-zhen   

  1. School of Sciences, Beijing University of Posts and Telecommunications
  • Online:2006-04-28 Published:2006-04-28

摘要: 运用解析方法对量子点的结构进行分析,通过对积分核函数进行计算,可以得到各种量子点结构的应力应变分布. 同时,对常见的金字塔形和圆锥形等量子点的结构进行了具体分析,并且与有限元方法计算得到的结果进行了比较. 结果证明,这种方法能更加普遍地得到量子点结构的应力应变分布,提高了计算速度,可以方便地应用于量子点的电子能级计算.

关键词: 量子点, 应力应变分布, 格林函数

Abstract: An analytical method based on Green's function for calculating strain filed in quantum dot structures of arbitrary shape was presented. The method involves the evaluation of a surface integral over the boundary of the quantum dot. The strain distributions for some shapes as pyramid and cone were discussed. Compare to the element method, our method is more straightforward and faster to implement, and it is also particularly well suited as an input step in calculation of the electronic properties of quantum dots.

Key words: quantum dots, stress and strain distribution, Green method