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

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dc.contributor.author Schuh, K.
dc.contributor.author Barthel, S.
dc.contributor.author Marquardt, Oliver
dc.contributor.author Hickel, Tilmann
dc.contributor.author Neugebauer, J.
dc.contributor.author Czycholl, G.
dc.contributor.author Jahnke, F.
dc.date.accessioned 2017-07-28T10:48:29Z
dc.date.available 2017-07-28T10:48:29Z
dc.date.issued 2012
dc.identifier.citation 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. doi: 10.1063/1.3688900 en
dc.identifier.volume 100
dc.identifier.issued 9
dc.identifier.startpage 1
dc.identifier.endpage 4
dc.identifier.issn 0003-6951
dc.identifier.issn 1077-3118
dc.identifier.uri http://hdl.handle.net/10468/4303
dc.identifier.doi 10.1063/1.3688900
dc.description.abstract Optical 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.sponsorship Deutsche Forschungsgemeinschaft en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher AIP Publishing en
dc.relation.uri http://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/10.1063/1.3688900 en
dc.subject Quantum dots en
dc.subject Ground states en
dc.subject Spatial dimensions en
dc.subject Polarization en
dc.subject Optical properties en
dc.title Strong dipole coupling in nonpolar nitride quantum dots due to Coulomb effects en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Oliver Marquardt, Tyndall National Institute, University College Cork, Cork, Ireland +353-21- 490-3000 Email: oliver.marquardt@tyndall.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.internal.wokid WOS:000301504800025
dc.contributor.funder Deutsche Forschungsgemeinschaft
dc.description.status Peer reviewed en
dc.identifier.journaltitle Applied Physics Letters en
dc.identifier.articleid 92103


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