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Title: Pyramidal core-shell quantum dot under applied electric and magnetic fields
Authors: Osorio, J.A.
Caicedo Paredes, D.
Vinasco, J.A
Morales Aramburo, Álvaro Luis
Radu, A.
Restrepo Arango, Ricardo León
Martínez Orozco, Juan Carlos
Tiutiunnyk, A.
Laroze, D.
N. Hieu, Nguyen
V. Phuc, Huynh
Mora Ramos, Miguel Eduardo
Duque, Carlos Alberto
Issue Date: 2-Jun-2020
Publisher: Nature
Abstract: We have theoretically investigated the electronic states in a core/shell pyramidal quantum dot with GaAs core embedded in AlGaAs matrix. This system has a quite similar recent experimental realization through a cone/shell structure [Phys. Status Solidi-RRL 13, 1800245 (2018)]. The research has been performed within the efective mass approximation taking into account position-dependent efective masses and the presence of external electric and magnetic felds. For the numerical solution of the resulting three-dimensional partial diferential equation we have used a fnite element method. A detailed study of the conduction band states wave functions and their associated energy levels is presented, with the analysis of the efect of the geometry and the external probes. The calculation of the non-permanent electric polarization via the of-diagonal intraband dipole moment matrix elements allows to consider the related optical response by evaluating the coefcients of light absorption and relative refractive index changes, under diferent applied magnetic feld confgurations.
ISSN: 2045-2322
Other Identifiers: info:eu-repo/semantics/publishedVersion
Appears in Collections:*Documentos Académicos*-- Doc. en Ciencias Básicas

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