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Ground State of a Two-Electron Quantum Dot with a Gaussian Confining Potential |
| XIE Wen-Fang |
| Department of Physics, Guangzhou University, Guangzhou 510006 |
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| Cite this article: |
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XIE Wen-Fang 2006 Chin. Phys. Lett. 23 193-195 |
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Abstract We investigate the ground-state properties of a two-dimensional two-electron quantum dot with a Gaussian confining potential under the influence of perpendicular homogeneous magnetic field. Calculations are carried out by using the method of numerical diagonalization of Hamiltonian matrix within the effective-mass approximation. A ground-state behaviour (singlet→triplet state transitions) as a function of the strength of a magnetic field has been found. It is found that the dot radius R of the Gaussian potential is important for the ground-state transition and the feature of ground-state for the Gaussian potential quantum dot (QD), and the parabolic potential QDs are similar when R is larger. The larger the quantum dot radius, the smaller the magnetic field for the singlet-triplet transition of the ground-state of two interacting electrons in the Gaussian quantum dot.
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| Keywords:
73.20.Dx
73.21.La
73.40.Kp
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Published: 01 January 2006
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| PACS: |
73.20.Dx
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73.21.La
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(Quantum dots)
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73.40.Kp
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(III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
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