https://doi.org/10.1140/epjp/s13360-023-04281-x
Regular Article
The influence of the electric and magnetic fields on donor impurity electronic states and optical absorption coefficients in a core/shell GaAs/Al
Ga
As ellipsoidal quantum dot
1
Laboratory of Intelligent Systems, Georesources and Renewable Energies (SIGER), Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, 2202, Fez, Morocco
2
Laboratory of Solid-State Physics (LPS), Department of Physics, Faculty of Science Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, 1796, Fez, Morocco
3
Laboratoire de la Matière Condensée et des Nanosciences (LMCN), Département de Physique, Faculté des Sciences de Monastir, 5019, Monastir, Tunisia
4
Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
Received:
1
February
2023
Accepted:
13
July
2023
Published online:
31
August
2023
The lowest five energies levels (ELs) and optical absorption coefficient (OAC) of confined donor in a core/shell ellipsoidal quantum dot were theoretically investigated under the impacts of applied electric and magnetic fields. The energy spectrum and wave functions are generated by solving the Schrodinger equation with the finite element method. External magnetic or electric fields and their directions have a considerable effect on the energy levels and dipole matrix element. The computations revealed that changing the directions of the external fields causes a change in the energy levels, implying that OAC fluctuations of these transitions are closely tied to magnetic and electric field angles. We also, demonstrated that changes in light polarization cause blue- or red-shifts in the intersubband OAC spectra, depending on the orientations of the two external fields and the existence or absence of an impurity (k = 0, 1). Furthermore, in all cases, the insertion of a on-center impurity somewhat enhances the OAC peaks and shifts the resonant peaks.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
