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Interplay between Coulomb interaction and quantum-confined Stark-effect in polar and nonpolar wurtzite InN/GaN quantum dots

Identifieur interne : 000A14 ( Main/Repository ); précédent : 000A13; suivant : 000A15

Interplay between Coulomb interaction and quantum-confined Stark-effect in polar and nonpolar wurtzite InN/GaN quantum dots

Auteurs : RBID : Pascal:14-0045321

Descripteurs français

Pascal (Inist)
- Interaction coulombienne, Effet Stark confinement quantique, Continuum, Théorie élasticité, Orbitale liaison, Spectre absorption, Transition optique, Problème n corps, Structure bande, Nitrure d'indium, Nitrure de gallium, Point quantique, InN, GaN.

English descriptors

KwdEn :
- Absorption spectra, Band structure, Bond orbital, Continuum, Coulomb interaction, Elasticity theory, Gallium nitride, Indium nitride, N-body problems, Optical transition, Quantum confined Stark effect, Quantum dots.

Abstract

In this paper we systematically analyze the electronic structures of polar and nonpolar wurtzite-InN/GaN quantum dots and their modification due to the quantum-confined Stark effect caused by intrinsic fields. This is achieved by combining continuum elasticity theory with an effective-bond orbital model to describe the elastic and single-particle electronic properties in these nitride systems. Based on these results, a many-body treatment is used to determine optical absorption spectra. The efficiency of optical transitions depends on the interplay between the Coulomb interaction and the quantum-confined Stark effect. We introduce an effective confinement potential which represents the electronic structure under the influence of the intrinsic polarization fields and calculate the needed strength of Coulomb interaction to diminish the separation of electrons and holes.

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Pascal:14-0045321

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Interplay between Coulomb interaction and quantum-confined Stark-effect in polar and nonpolar wurtzite InN/GaN quantum dots

Interplay between Coulomb interaction and quantum-confined Stark-effect in polar and nonpolar wurtzite InN/GaN quantum dots

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri