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DC Field Value Language Muckel, Franziska - Lorenz, Severin - Yang, Jiwoong - Nugraha, Taufik Adi - Scalise, Emilio - Hyeon, Taeghwan - Wippermann, Stefan - Bacher, Gerd - 2020-09-22T08:13:05Z - 2020-09-22T08:13:05Z - 2020-09-02 - 2020-08 -
dc.identifier.citation Nature Communications, v.11, no.1, pp.4127 -
dc.identifier.issn 2041-1723 -
dc.identifier.uri -
dc.description.abstract The fundamental bandgap Eg of a semiconductor—often determined by means of optical spectroscopy—represents its characteristic fingerprint and changes distinctively with temperature. Here, we demonstrate that in magic sized II-VI clusters containing only 26 atoms, a pronounced weakening of the bonds occurs upon optical excitation, which results in a strong exciton-driven shift of the phonon spectrum. As a consequence, a drastic increase of dEg/dT (up to a factor of 2) with respect to bulk material or nanocrystals of typical size is found. We are able to describe our experimental data with excellent quantitative agreement from first principles deriving the bandgap shift with temperature as the vibrational entropy contribution to the free energy difference between the ground and optically excited states. Our work demonstrates how in small nanoparticles, photons as the probe medium affect the bandgap—a fundamental semiconductor property. © 2020, The Author(s). -
dc.language English -
dc.publisher Nature Publishing Group -
dc.title Exciton-driven change of phonon modes causes strong temperature dependent bandgap shift in nanoclusters -
dc.type Article -
dc.identifier.doi 10.1038/s41467-020-17563-0 -
dc.identifier.wosid 000563565300018 -
dc.identifier.scopusid 2-s2.0-85089496342 -
dc.contributor.localid 190256 -
dc.type.local Article(Overseas) -
dc.type.rims ART -
dc.description.journalClass 1 -
dc.citation.publicationname Nature Communications -
dc.contributor.nonIdAuthor Muckel, Franziska -
dc.contributor.nonIdAuthor Lorenz, Severin -
dc.contributor.nonIdAuthor Nugraha, Taufik Adi -
dc.contributor.nonIdAuthor Scalise, Emilio -
dc.contributor.nonIdAuthor Hyeon, Taeghwan -
dc.contributor.nonIdAuthor Wippermann, Stefan -
dc.contributor.nonIdAuthor Bacher, Gerd -
dc.identifier.citationVolume 11 -
dc.identifier.citationNumber 1 -
dc.identifier.citationStartPage 4127 -
dc.identifier.citationTitle Nature Communications -
dc.type.journalArticle Article -
dc.description.isOpenAccess Y -
dc.subject.keywordPlus QUANTUM DOTS -
dc.subject.keywordPlus ENERGY-GAP -
dc.subject.keywordPlus CDSE -
dc.subject.keywordPlus LUMINESCENCE -
dc.subject.keywordPlus SURFACE -
dc.subject.keywordPlus SI -
dc.subject.keywordPlus NANOPARTICLES -
dc.subject.keywordPlus TRANSITION -
dc.subject.keywordPlus PEROVSKITE -
dc.contributor.affiliatedAuthor Muckel, Franziska -
dc.contributor.affiliatedAuthor Lorenz, Severin -
dc.contributor.affiliatedAuthor Yang, Jiwoong -
dc.contributor.affiliatedAuthor Nugraha, Taufik Adi -
dc.contributor.affiliatedAuthor Scalise, Emilio -
dc.contributor.affiliatedAuthor Hyeon, Taeghwan -
dc.contributor.affiliatedAuthor Wippermann, Stefan -
dc.contributor.affiliatedAuthor Bacher, Gerd -
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Department of Energy Science and Engineering NanoMaterials Laboratory 1. Journal Articles


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