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Small-Polaron Hopping and Low-Temperature (45–225 K) Photo-Induced Transient Absorption in Magnesium-Doped Lithium Niobate

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https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-202105184716
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DC ElementWertSprache
dc.creatorMesserschmidt, Simon-
dc.creatorKrampf, Andreas-
dc.creatorVittadello, Laura-
dc.creatorImlau, Mirco-
dc.creatorNörenberg, Tobias-
dc.creatorEng, Lukas M.-
dc.creatorEmin, David-
dc.date.accessioned2021-05-18T09:40:06Z-
dc.date.available2021-05-18T09:40:06Z-
dc.date.issued2020-09-14-
dc.identifier.citationMesserschmidt, S.; Krampf, A.; Vittadello, L.; Imlau, M.; Nörenberg, T.; Eng, L.M.; Emin, D.: Small-Polaron Hopping and Low-Temperature (45–225 K) Photo-Induced Transient Absorption in Magnesium-Doped Lithium Niobate. Crystals 2020, 10, 809.ger
dc.identifier.urihttps://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-202105184716-
dc.description.abstractA strongly temperature-dependent photo-induced transient absorption is measured in 6.5 mol% magnesium-doped lithium niobate at temperatures ranging from 45 K to 225 K. This phenomenon is interpreted as resulting from the generation and subsequent recombination of oppositely charged small polarons. Initial two-photon absorptions generate separated oppositely charged small polarons. The existence of these small polarons is monitored by the presence of their characteristic absorption. The strongly temperature-dependent decay of this absorption occurs as series of thermally assisted hops of small polarons that facilitate their merger and ultimate recombination. Our measurements span the high-temperature regime, where small-polaron jump rates are Arrhenius and strongly dependent on temperature, and the intermediate-temperature regime, where small-polaron jump rates are non-Arrhenius and weakly dependent on temperature. Distinctively, this model provides a good representation of our data with reasonable values of its two parameters: Arrhenius small-polaron hopping’s activation energy and the material’s characteristic phonon frequency.eng
dc.relationhttps://doi.org/10.3390/cryst10090809ger
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectlithium niobateeng
dc.subjectsmall polaron hoppingeng
dc.subjecttransient absorptioneng
dc.subject.ddc530 - Physikger
dc.titleSmall-Polaron Hopping and Low-Temperature (45–225 K) Photo-Induced Transient Absorption in Magnesium-Doped Lithium Niobateeng
dc.typeEinzelbeitrag in einer wissenschaftlichen Zeitschrift [article]ger
orcid.creatorhttps://orcid.org/0000-0001-6193-7487-
orcid.creatorhttps://orcid.org/0000-0001-8023-0946-
orcid.creatorhttps://orcid.org/0000-0002-2484-4158-
orcid.creatorhttps://orcid.org/0000-0001-5790-9379-
orcid.creatorhttps://orcid.org/0000-0002-5343-5636-
dc.identifier.doi10.3390/cryst10090809-
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