| The study of the valence bond property in a two—different—quantum—dot molecule |
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| 引用本文： | 王立民,罗莹,马本堃. The study of the valence bond property in a two—different—quantum—dot molecule[J]. 中国物理, 2002, 11(2): 150-155. DOI: 10.1088/1009-1963/11/2/309 |
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| 作者姓名： | 王立民 罗莹 马本堃 |
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| 作者单位： | (1)Department of Physics, Beijing Normal University, Beijing 100875, China; (2)Department of Physics, Beijing Normal University, Beijing 100875, China; Department of Physics, Hebei Normal University, Shijiazhuang 050091, China |
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| 基金项目： | Project supported by the Doctoral Programme Foundation of the Education Ministry of China (Grant No. 96002703). |
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| 摘 要： | The electronic energy spectrum and wavefunction of a quantum-dot molecule are studied by means of the finite-element solution of the single electron Schr?dinger equation. We find that the nature of the coupling can be covalent, ionic, or "intermediate" new mixed states, depending on various parameters such as the separation distance between two dots, the height of potential barrier, matching of the energies and parities of the orbital localized on each dot. The bond property can be used to explain the experimental result obtained by Oosterkamp et al. (1998 Nature 395 873).
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| 关 键 词： | 半导体 量子光点特性 价带 离子带 |
| 收稿时间： | 2001-07-10 |
The study of the valence bond property in a two-different-quantum-dot molecule |
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| Wang Li-Min,Luo Ying and Ma Ben-Kun. The study of the valence bond property in a two-different-quantum-dot molecule[J]. Chinese Physics, 2002, 11(2): 150-155. DOI: 10.1088/1009-1963/11/2/309 |
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| Authors: | Wang Li-Min Luo Ying Ma Ben-Kun |
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| Affiliation: | Department of Physics, Beijing Normal University, Beijing 100875, China; Department of Physics, Hebei Normal University, Shijiazhuang 050091, China |
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| Abstract: | The electronic energy spectrum and wavefunction of a quantum-dot molecule are studied by means of the finite-element solution of the single electron Schr?dinger equation. We find that the nature of the coupling can be covalent, ionic, or "intermediate" new mixed states, depending on various parameters such as the separation distance between two dots, the height of potential barrier, matching of the energies and parities of the orbital localized on each dot. The bond property can be used to explain the experimental result obtained by Oosterkamp et al. (1998 Nature 395 873). |
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| Keywords: | electronic structure symmetry covalent bond ionic bond mixed state |
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