Within the effective-mass approximation a simple method to calculate the spectra of a shallowdonor impurity in GaAsยฑ(Ga, Al)As cylindrical quantum-well wires (QWWs) suitable for any confinement potential shape in radial direction is proposed. A trial function is taken as the product of a hydrogenic
Binding energy of shallow donor impurity in asymmetric quantum wells
โ Scribed by Chaojin Zhang; Zhanxin Wang; Ying Liu; Kangxian Guo
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 347 KB
- Volume
- 43
- Category
- Article
- ISSN
- 1386-9477
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In this study, effects of the electric field applied along the growth direction on the binding energy of donor impurities in double inverse parabolic quantum well (DIPQW) with different well and barrier widths, as well as different Al concentrations in the center of the wells have been investigated.
Using a variational procedure within the effective-mass approximation we have calculated the binding energies of shallow-donor impurities in cylindrical GaAs quantum-well wires, in an axial magnetic field and an infinite confinement potential. In contrast to the previous results in quantum wells, we