Self-organized GaN/AlN hexagonal quantum-dots:strain distribution and electronic structure
Liu Yu-Min(刘玉敏)a)b)†, Yu Zhong-Yuan(俞重远)a)b), Ren Xiao-Min(任晓敏)b), and Xu Zi-Huan(徐子欢)a)b)
aSchool of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; b Key Laboratory of Optical Communication and Lightwave Technologies of Ministry of Education (Beijing University of Posts and Telecommunications), Beijing 100876, China
Abstract This paper presents a finite element method of calculating strain distributions in and around the self-organized GaN/AlN hexagonal quantum dots. The model is based on the continuum elastic theory, which is capable of treating a quantum dot with an arbitrary shape. A truncated hexagonal pyramid shaped quantum dot is adopted in this paper. The electronic energy levels of the GaN/AlN system are calculated by solving a three-dimension effective mass Shrödinger equation including a strain modified confinement potential and polarization effects. The calculations support the previous results published in the literature.
Received: 03 March 2008
Revised: 30 March 2008
Accepted manuscript online:
PACS:
73.20.At
(Surface states, band structure, electron density of states)
Fund: Project supported by the State Key
Development Program for Basic Research of China (Grant No
2003CB314901), the National Natural Science Foundation of China
(Grant No 60644004), and High School Innovation and Introducing
Intellect Project of China (Grant
Cite this article:
Liu Yu-Min(刘玉敏), Yu Zhong-Yuan(俞重远), Ren Xiao-Min(任晓敏), and Xu Zi-Huan(徐子欢) Self-organized GaN/AlN hexagonal quantum-dots:strain distribution and electronic structure 2008 Chin. Phys. B 17 3471
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
