| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1809512 | Physica B: Condensed Matter | 2014 | 6 Pages |
Abstract
The donor-impurity related photoionization cross section in GaAs/Ga1−xAlxAsGaAs/Ga1−xAlxAs three-dimensional concentric double quantum rings is investigated. The photoionization cross section dependence on the incident photon energy is studied considering the effects of hydrostatic pressure, variations of aluminum concentration, geometries of the structure, and impurity position. The interpretation of the dipole matrix element, which reflects the photoionization probability, is also given. We have found that these parameters can lead to both redshift and blueshift of the photoionization spectrum and also influence the cross section peak value.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
H.M. Baghramyan, M.G. Barseghyan, A.A. Kirakosyan, D. Laroze, C.A. Duque,