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Effects of Electric Field on the Valence-Bond Property of an Electron in a Quantum-Dot Molecule |
| WANG Li-Min1,2; LUO Ying1;MA Ben-Kun1 |
| 1Department of Physics and Institute of Theoretical
Physics, Beijing Normal University, Beijing 100875
1Department of Physics, Hebei Normal University, Shijiazhuang 050091
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| Cite this article: |
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WANG Li-Min, LUO Ying, MA Ben-Kun 2002 Chin. Phys. Lett. 19 846-849 |
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Abstract The electronic structure of the quantum-dot molecules in an electric field is investigated by the finite element method with the effective mass approximation. The numerical calculation results show that the valence bond of the quantum-dot molecule alternates between covalent bonds and ionic bonds as the electric field increases. The valence-bond property can be reflected by the oscillator strength of the intraband transition. The bound state with the highest energy level in the quantum-dot molecule gradually changes into a quasibound state when the electric field increases.
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| Keywords:
73.20.Dx
73.23.-b
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Published: 01 June 2002
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