Electronic structures of stacked layers quantum dots: influence of the non-perfect alignment and the applied electric field |
| |
Authors: | Jia Bo-Yong Yu Zhong-Yuan Liu Yu-Min Han Li-Hong Yao Wen-Jie Feng Hao and Ye Han |
| |
Institution: | Key Laboratory of Information Photonics and Optical Communications (Ministry of Education), Beijing University of Posts and Telecommunications, Beijing 100876, China |
| |
Abstract: | Electronic structures of the artificial molecule comprising two truncated pyramidal quantum dots vertically coupled and embedded in the matrix are theoretically analysed via the finite element method. When the quantum dots are completely aligned, the electron energy levels decrease with the horizontally applied electric field. However, energy levels may have the maxima at non-zero electric field if the dots are staggered by a distance of several nanometers in the same direction of the electric field. In addition to shifting the energy levels, the electric field can also manipulate the electron wavefunctions confined in the quantum dots, in company with the non-perfect alignment. |
| |
Keywords: | electronic structure quantum dot non-perfect alignment electric field |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |