Effects of a donor on the bond property of quantum-dot molecules
Wang Li-Min (王立民)ab, Luo Ying (罗莹)c, Ma Ben-Kun (马本堃)c, Duan Su-Qing (段素青)a, Zhao Xian-Geng (赵宪庚)a
a Institute of Applied Physics and Computational Mathematics, Beijing 100088, China; b Department of Physics, Hebei Normal University, Shijiazhuang 050091, China; c Department of Physics and Institute of Theoretical Physics, Beijing Normal University, Beijing 100875, China
Abstract Within the framework of effective mass approximation, we have calculated the electronic structure of the two laterally coupled quantum dots with a donor by the finite element method. The calculated results show that the bond states of quantum-dot molecules are quite sensitive to the donor positions. By varying the donor position, the transition from covalent to ionic bond state is realized for some electronic states. Some extreme cases are also discussed for comparison.
Received: 16 October 2003
Revised: 03 February 2004
Accepted manuscript online:
Fund: Project supported in part by the National Natural Science Foundation of China (Grant Nos 10274007 and 90103027), and in part by the Doctoral Research Fund of Hebei Normal University.
Cite this article:
Wang Li-Min (王立民), Luo Ying (罗莹), Ma Ben-Kun (马本堃), Duan Su-Qing (段素青), Zhao Xian-Geng (赵宪庚) Effects of a donor on the bond property of quantum-dot molecules 2004 Chinese Physics 13 942
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