| Exciton and Biexciton Binding Energies in Rectangular Quantum Dots |
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| 作者姓名： | 刘永辉 孔小均 |
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| 作者单位： | College of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050016 |
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| 基金项目： | Supported by the Hebei Natural Science Foundation under Grant No A2005000147. |
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| 摘 要： | In the effective mass approximation, using the variational technology and a method of expanding the wavefunctions of exciton in terms of the eigenfunctions of the noninteracting electron-hole system, we calculate the exciton and biexciton ground state binding energies for rectangular quantum dots （QDs）. In the calculation, a three-dimensional Fourier expansion of Coulomb potential is used to remove the numerical difficulty with the 1/r singularity, and it considerably reduces the computational effort. Our results agree fairly well with the previous results. It is found that the binding energies are highly correlated to the size of QDs. The quantum confinement effect of spherical QDs about biexciton is obviously larger than that of rectangular QDs when the well width is narrower than 2.0αB.
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| 关 键 词： | 矩形量子点 激发子 基态 傅立叶变换 量子限制 |
| 收稿时间： | 2005-07-01 |
| 修稿时间： | 2005-07-01 |
Exciton and Biexciton Binding Energies in Rectangular Quantum Dots |
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| LIU Yong-Hui, KONG Xiao-Jun.Exciton and Biexciton Binding Energies in Rectangular Quantum Dots[J].Chinese Physics Letters,2005,22(11):2963-2965. |
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| Authors: | LIU Yong-Hui KONG Xiao-Jun |
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