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Binding Energies of Excitons in Square Quantum-Well Wires in the Presence of a Magnetic Field |
| ZHANG Ying-Tao1,2;DI Bing1;XIE Zun1,2;LI You-Cheng1,3 |
| 1College of Physics, Hebei Normal University, Shijiazhuang 050016
2Institute of Physics, Hebei University of Technology, Tianjin 300130
3CCAST (World Laboratory), PO Box 8730, Beijing 100080 |
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| Cite this article: |
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ZHANG Ying-Tao, DI Bing, XIE Zun et al 2004 Chin. Phys. Lett. 21 166-169 |
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Abstract The binding energies of the ground state of excitons in the GaAs/Ga1-xAlxAs square quantum-well wire in the presence of a magnetic field are investigated by using the variational method. It is assumed that the magnetic field is applied parallel to the axis of the wire. The calculations of the binding energy as a function of the wire size have been performed for infinite and finite confinement potentials. The contribution of the magnetic field makes the binding energy larger obviously, particularly for the wide wire, and the magnetic field is much more pronounced for the binding energy in a square quantum wire than that in a cylindrical quantum wire. The mismatch of effective masses between the well and the barrier is also considered in the calculation.
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| Keywords:
73.21.Hb
71.35.Ji
71.55.Eq
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Published: 01 January 2004
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