Exciton binding energies in CdSe/MgSe quantum well structures

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dc.authoridYILDIRIM, Hasan/0000-0002-7436-7759
dc.contributor.authorYildirim, Hasan
dc.date.accessioned2024-09-29T16:00:46Z
dc.date.available2024-09-29T16:00:46Z
dc.date.issued2018
dc.departmentKarabük Üniversitesien_US
dc.description.abstractBinding energies of heavy- and light-hole excitons in CdSe/MgSe quantum wells have been determined in terms of quantum well width. Hydrogenic wave functions are assumed to represent exciton wave functions. Contribution of the polarization charges originating from the dielectric mismatch between the well and the barrier materials to the Coulomb interaction is calculated by means of image charge method. The effect of the exciton-phonon interaction on the exciton binding energies are included by means of an effective potential obtained through an exciton-bulk-optical-phonon Hamiltonian. The results indicate that both the modified Coulomb interaction due to the dielectric mismatch and the exciton-phonon interaction considerably change the exciton binding energy. The heavy-hole exciton binding energy in a 10-angstrom quantum well is seen to be enhanced as much as 87% compared to the value found when only the Coulomb interaction without dielectric mismatch is taken into account. The resulting binding energies of heavy-hole excitons range approximately between 57 and 41 meV for the quantum well width changing between 10 and 35 angstrom. Compared to the bulk CdSe exciton binding energy 15 meV, the exciton binding energies in CdSe/MgSe quantum wells are increased almost four times. (C) 2017 Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.spmi.2017.12.035
dc.identifier.endpage213en_US
dc.identifier.issn0749-6036
dc.identifier.scopus2-s2.0-85039744214en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage207en_US
dc.identifier.urihttps://doi.org/10.1016/j.spmi.2017.12.035
dc.identifier.urihttps://hdl.handle.net/20.500.14619/5334
dc.identifier.volume114en_US
dc.identifier.wosWOS:000425199200021en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAcademic Press Ltd- Elsevier Science Ltden_US
dc.relation.ispartofSuperlattices and Microstructuresen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCdSeen_US
dc.subjectMgSeen_US
dc.subjectExcitonen_US
dc.subjectQuantum wellen_US
dc.titleExciton binding energies in CdSe/MgSe quantum well structuresen_US
dc.typeArticleen_US

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