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Binding Energies of Negatively Charged Donors in a Gaussian Potential Quantum Dot |
| XIE Wen-Fang |
| Department of Physics, Guangzhou University, Guangzhou 510405 |
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| Cite this article: |
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XIE Wen-Fang 2005 Chin. Phys. Lett. 22 1768-1771 |
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Abstract We investigate a negatively charged donor centre (D-) trapped by a quantum dot, which is subjected to a Gaussian potential confinement. Calculations are carried out by using the method of numerical diagonalization of Hamiltonian within the effective-mass approximation. The dependence of the ground state of the negatively charged donor on the dot size and the potential depth is studied. The same calculations performed with the parabolic approximation of the Gaussian potential lead to the results that are qualitatively and quantitatively different.
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| Keywords:
73.21.-b
78.67.-n
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Published: 01 July 2005
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| PACS: |
73.21.-b
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(Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems)
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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