Strong dipole coupling in nonpolar nitride quantum dots due to Coulomb effects

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dc.contributor.authorSchuh, K.
dc.contributor.authorBarthel, S.
dc.contributor.authorMarquardt, Oliver
dc.contributor.authorHickel, Tilmann
dc.contributor.authorNeugebauer, J.
dc.contributor.authorCzycholl, G.
dc.contributor.authorJahnke, F.
dc.contributor.funderDeutsche Forschungsgemeinschaft
dc.date.accessioned2017-07-28T10:48:29Z
dc.date.available2017-07-28T10:48:29Z
dc.date.issued2012
dc.description.abstractOptical properties of polar and nonpolar nitride quantum dots (QDs) are determined on the basis of a microscopic theory which combines a continuum elasticity approach to the polarization potential, a tight-binding model for the electronic energies and wavefunctions, and a many-body theory for the optical properties. For nonpolar nitride quantum dots, we find that optical absorption and emission spectra exhibit a weak ground-state oscillator strength in a single-particle calculation whereas the Coulomb configuration interaction strongly enhances the ground-state transitions. This finding sheds new light on existing discrepancies between previous theoretical and experimental results for these systems, as a weak ground state transition was predicted because of the spatial separation of the corresponding electron and hole state due to intrinsic fields whereas experimentally fast optical transitions have been observed. (C) 2012 American Institute of Physics. (http://dx.doi.org/10.1063/1.3688900)en
dc.description.sponsorshipDeutsche Forschungsgemeinschaften
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid92103
dc.identifier.citationSchuh, K., Barthel, S., Marquardt, O., Hickel, T., Neugebauer, J., Czycholl, G. and Jahnke, F. (2012) 'Strong dipole coupling in nonpolar nitride quantum dots due to Coulomb effects', Applied Physics Letters, 100(9), pp. 092103. doi: 10.1063/1.3688900en
dc.identifier.doi10.1063/1.3688900
dc.identifier.endpage4
dc.identifier.issn0003-6951
dc.identifier.issn1077-3118
dc.identifier.issued9
dc.identifier.journaltitleApplied Physics Lettersen
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/4303
dc.identifier.volume100
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.urihttp://aip.scitation.org/doi/abs/10.1063/1.3688900
dc.rights© 2012 American Institute of Physics.This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Schuh, K., Barthel, S., Marquardt, O., Hickel, T., Neugebauer, J., Czycholl, G. and Jahnke, F. (2012) 'Strong dipole coupling in nonpolar nitride quantum dots due to Coulomb effects', Applied Physics Letters, 100(9), pp. 092103 and may be found at http://aip.scitation.org/doi/abs/10.1063/1.3688900en
dc.subjectQuantum dotsen
dc.subjectGround statesen
dc.subjectSpatial dimensionsen
dc.subjectPolarizationen
dc.subjectOptical propertiesen
dc.titleStrong dipole coupling in nonpolar nitride quantum dots due to Coulomb effectsen
dc.typeArticle (peer-reviewed)en
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