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Combined effect of the screening of a donor ion and the conduction band nonparabolicity on the binding energy of a donor at the center of a spherical quantum dot

✍ Scribed by A. M. Elabsy; P. Csavinszky

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
283 KB
Volume
60
Category
Article
ISSN
0020-7608

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✦ Synopsis

We carried out variational model calculations for the assessment of the combined effect of the nonparabolicity of the electron effective mass and the screening of the donor ion by the valence electrons of GaAs for a donor placed at the center of a spherical quantum dot. We considered finite confining potentials between the GaAs QD and the surrounding Ga,_,Al,As matrix. We found that the combined effect becomes more pronounced as the radius of the quantum dot decreases.

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