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The influence of the electric and magnetic fields on donor impurity electronic states and optical absorption coefficients in a core/shell GaAs/Al\(_{0.33}\)Ga\(_{0.67}\)As ellipsoidal quantum dot

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Abstract

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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Data Availability Statement

This manuscript has associated data in a data repository. [Authors’ comment: All data included in this manuscript are available upon request by contacting with corresponding author].

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Acknowledgements

This research is carried out at the SIGER (FST USMBA University Morocco) & LPS (FSDM USMBA University Morocco) laboratories. CAD is grateful to the Colombian Agencies: CODI-Universidad de Antioquia (Estrategia de Sostenibilidad de la Universidad de Antioquia and projects “Propiedades magneto-ópticas y óptica no lineal en superredes de Grafeno,” “Estudio de propiedades ópticas en sistemas semiconductores de dimensiones nanoscópicas,” “Propiedades de transporte, espintrónicas y térmicas en el sistema molecular ZincPorfirina,” and “Complejos excitónicos y propiedades de transporte en sistemas nanométricos de semiconductores con simetría axial”), and Facultad de Ciencias Exactas y Naturales-Universidad de Antioquia (CAD exclusive dedication project 2022-2023).

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Authors and Affiliations

  1. Laboratory of Intelligent Systems, Georesources and Renewable Energies (SIGER), Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, 2202, Fez, Morocco

    A. Ed-Dahmouny & N. Es-Sbai

  2. Laboratory of Solid-State Physics (LPS), Department of Physics, Faculty of Science Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, 1796, Fez, Morocco

    R. Arraoui, M. Jaouane, A. Fakkahi, A. Sali & K. El-Bakkari

  3. Laboratoire de la Matière Condensée et des Nanosciences (LMCN), Département de Physique, Faculté des Sciences de Monastir, 5019, Monastir, Tunisia

    N. Zeiri

  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

    C. A. Duque

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The following responsibilities were assigned to the authors who participated in the study: AED & RA collaborated on the numerical computations, detailed analysis and paper writing. CAD & AS suggested the problem and collaborated on the numerical computations and text writing. NES & NZ contributed on the detailed analysis and paper drafting. MJ collaborated on the numerical computations, discussions and writing. AF & KEB worked on the numerical calculations and writing of the manuscript.

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Correspondence to C. A. Duque.

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Ed-Dahmouny, A., Arraoui, R., Jaouane, M. et al. The influence of the electric and magnetic fields on donor impurity electronic states and optical absorption coefficients in a core/shell GaAs/Al\(_{0.33}\)Ga\(_{0.67}\)As ellipsoidal quantum dot. Eur. Phys. J. Plus 138, 774 (2023). https://doi.org/10.1140/epjp/s13360-023-04281-x

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