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dc.contributor.author | Heber J. | |
dc.contributor.author | Demirbilek R. | |
dc.contributor.author | Nikitin S. | |
dc.date.accessioned | 2018-09-17T20:52:53Z | |
dc.date.available | 2018-09-17T20:52:53Z | |
dc.date.issued | 2004 | |
dc.identifier.issn | 0925-8388 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/134196 | |
dc.description.abstract | CsCdBr3 has a quasi-linear crystal structure. It consists of covalently bound [CdBr]6 4- chains separated by chains of Cs+ ions. The trivalent rare-earth (RE) ions substitute for divalent Cd ions forming predominantly pair centers of the type RE3+-(Cd vacancy)-RE3+. A minority of RE ions forms "single-ion" centers with more distant charge compensation. The electronic structure around the band gap is determined by the [CdBr]6 4- octahedra. The lowest excitonic states of the lattice are charge-transfer states of these octahedra. At low temperatures they form self-trapped excitons which become mobile around 80 K. In addition we find defect-localized excitons at the RE pairs and single ions with slightly modified spectra. There is a strong energy transfer between the RE ions and the defect-localized excitons in both directions with transition times below 10-8s. For the cooperative fluorescence transition 1D2 × 1G 4 → 3H4 × 3H4 in Pr3+: CsCdBr3 a frequency-modulated vibronic sideband spectrum was found with up to four repetitions of the frequency of the localized optical phonon mode at the ion pair. © 2004 Elsevier B.V. All rights reserved. | |
dc.relation.ispartofseries | Journal of Alloys and Compounds | |
dc.subject | CsCdBr3 | |
dc.subject | Excitons | |
dc.subject | Rare-earth ions | |
dc.title | Excitons and rare-earth ions in CsCdBr3 | |
dc.type | Conference Paper | |
dc.relation.ispartofseries-issue | 1-2 SPEC. ISS. | |
dc.relation.ispartofseries-volume | 380 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 50 | |
dc.source.id | SCOPUS09258388-2004-380-12-SID4744361681 |