Calculation of the Raman frequency and the damping constant of a coupled mode in the ferroelectric and paraelectric phases in KH(2)PO(4)

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dc.authorid0000-0003-4067-1004en_US
dc.authorid0000-0002-7745-6490en_US
dc.authorid0000-0001-7830-6243
dc.contributor.authorKaraçalı, Hüseyin
dc.contributor.authorKiracı, Ali
dc.contributor.authorYurtseven, Hasan Hamit
dc.date.accessioned2021-06-23T19:27:06Z
dc.date.available2021-06-23T19:27:06Z
dc.date.issued2010
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractThe Raman frequency of the coupled mode omega_ associated with the order parameter is calculated as a function of pressure from the mean field theory in the ferroelecric phase of KDP. Using the frequencies of the coupled mode, the pressure dependence of the damping constant Gamma_ is calculated by the proton spin lattice relaxation time and by the energy fluctuation of this mode of KDP in the ferroelectric (FE) phase. For the paraelectric (PE) phase, the Raman frequency of the coupled mode omega is calculated as a function of temperature at 6.54 kbar. The temperature dependence of the damping constant Gamma_ is performed only by the energy fluctuation of the coupled mode omega_ in the PE phase of KDP. The values of the activation energy U are extracted from the pressure and temperature dependence of the damping constant Gamma_ of this coupled mode omega_ for both FE and PE phase of KDP. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheimen_US
dc.identifier.doi10.1002/pssb.200945181
dc.identifier.endpage936en_US
dc.identifier.issn0370-1972
dc.identifier.issue4en_US
dc.identifier.scopus2-s2.0-77954189860en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage927en_US
dc.identifier.urihttps://doi.org/10.1002/pssb.200945181
dc.identifier.urihttps://hdl.handle.net/20.500.12491/6735
dc.identifier.volume247en_US
dc.identifier.wosWOS:000276804400019en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorKaraçalı, Hüseyin
dc.language.isoenen_US
dc.publisherWiley-V C H Verlag Gmbhen_US
dc.relation.ispartofPhysica Status Solidi B-Basic Solid State Physicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectRaman Frequencyen_US
dc.subjectDamping Constanten_US
dc.subjectKH(2)PO(4)en_US
dc.subjectLattice Dynamicsen_US
dc.titleCalculation of the Raman frequency and the damping constant of a coupled mode in the ferroelectric and paraelectric phases in KH(2)PO(4)en_US
dc.typeArticleen_US

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