Theoretical investigation of single dopant in core/shell nanocrystal in magnetic field

Talbi, Abdelkrim; Feddi, E.; Oukerroum, A.; Assaid, E.; Dujardin, F.; Addou, M.

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.1016/j.spmi.2015.06.029

Titre :

Theoretical investigation of single dopant in core/shell nanocrystal in magnetic field

Auteur(s) :

Talbi, Abdelkrim [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Feddi, E. [Auteur]
Université Mohammed V de Rabat [Agdal] [UM5]
Oukerroum, A. [Auteur]
Université Hassan II de Casablanca = University of Hassan II Casablanca = جامعة الحسن الثاني (ar) [UH2MC]
Assaid, E. [Auteur]
Dujardin, F. [Auteur]
Laboratoire de Chimie et Physique - Approche Multi-échelle des Milieux Complexes [LCP-A2MC]
Addou, M. [Auteur]
Université Ibn Tofaïl [UIT]

Titre de la revue :

Superlattices and Microstructures

Pagination :

581-591

Éditeur :

Elsevier

Date de publication :

2015-09

ISSN :

0749-6036

Mot(s)-clé(s) en anglais :

Single dopant
Core-shell
Magnetic field
Donor

Discipline(s) HAL :

Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]

Résumé en anglais : [en]

The control of single dopant or ``solitary dopant'' in semiconductors constitute a challenge to achieve new range of tunable optoelectronic devices. Knowing that the properties of doped monocrystals are very sensitive to ...
Lire la suite >The control of single dopant or ``solitary dopant'' in semiconductors constitute a challenge to achieve new range of tunable optoelectronic devices. Knowing that the properties of doped monocrystals are very sensitive to different external perturbations, the aim of this study is to understand the effect of a magnetic field on the ground state energy of an off-center ionized donor in a core/shell quantum dot (CSQD). The binding energies with and without an applied magnetic field are determined by the Ritz variational method taking into account the electron-impurity correlation in the trial wave function deduced from the second-order perturbation. It has been found that the external magnetic field affects strongly the binding energy, and its effect varies as a function of the core radius and the shell thickness. We have shown the existence of a threshold ratio (alb),i, which represents the limit between the tridimensional and the spherical surface confinement. In addition our analysis demonstrates the important influence of the position of ionized donor in the shell material.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL

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