中国物理B ›› 2002, Vol. 11 ›› Issue (2): 150-155.doi: 10.1088/1009-1963/11/2/309

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The study of the valence bond property in a two-different-quantum-dot molecule

罗莹1, 马本堃1, 王立民2   

  1. (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
  • 收稿日期:2001-07-10 修回日期:2001-10-15 出版日期:2002-02-13 发布日期:2005-06-13
  • 基金资助:
    Project supported by the Doctoral Programme Foundation of the Education Ministry of China (Grant No. 96002703).

The study of the valence bond property in a two-different-quantum-dot molecule

Wang Li-Min (王立民)ab, Luo Ying (罗莹)a, Ma Ben-Kun (马本堃)a   

  1. a Department of Physics, Beijing Normal University, Beijing 100875, China; b Department of Physics, Hebei Normal University, Shijiazhuang 050091, China
  • Received:2001-07-10 Revised:2001-10-15 Online:2002-02-13 Published:2005-06-13
  • Supported by:
    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).

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).

Key words: electronic structure, symmetry, covalent bond, ionic bond, mixed state

中图分类号:  (Quantum dots)

  • 73.21.La