https://doi.org/10.1140/epjp/s13360-024-05737-4
Regular Article
Assessing magnetization and magnetic susceptibility of inverted core/shell spherical one-electron quantum dots: size and off-center displacement effects
1
College of Technology, University of Buea, P. O. Box 63, Buea, Cameroon
2
Department of Physics, Faculty of Sciences, University of Maroua, P. O. Box 814, Maroua, Cameroon
3
Laboratoire de Physique Fondamentale, UFD Mathématiques, Informatique Appliquée et Physique Fondamentale, University of Douala, P.O. Box 24157, Douala, Cameroon
Received:
8
June
2024
Accepted:
10
October
2024
Published online:
28
October
2024
The magnetization and magnetic susceptibility of ZnS/CdSe core/shell spherical quantum dot encapsulated in SiO2 matrix with or without impurity have been investigated using a variational approach in which the B-splines functions are used. Our approach is achieved in the framework of the effective mass approximation, and the confining potential has the form of a finite height barrier. The mismatch of the electron effective mass and dielectric constant between the core and shell materials is considered. Moreover, the effect of the off-center displacement is also examined and the studies are focused not only on the ground state but also on the first two excited states. It is revealed that the magnetization and magnetic susceptibility of a core-shell system can be tuned by modifying the shell and core thickness, and the off-center displacement when a donor impurity is present. Furthermore, because of the negative values of both the magnetization and magnetic susceptibility, the system clearly shows a diamagnetic behavior. It appears also that the increase of the magnetic field strength, the off-center displacement or the shell size could strengthen the diamagnetic character of the system.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. 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.
