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Reply to Comment on Temperature-induced structural phase transition in CaBr2 studied by Raman spectroscopy

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dc.contributor.author Raptis, C en
dc.contributor.author McGreevy, RL en
dc.date.accessioned 2014-03-01T11:45:29Z
dc.date.available 2014-03-01T11:45:29Z
dc.date.issued 1991 en
dc.identifier.issn 01631829 en
dc.identifier.uri http://hdl.handle.net/123456789/37446
dc.title Reply to Comment on Temperature-induced structural phase transition in CaBr2 studied by Raman spectroscopy en
heal.type other en
heal.identifier.primary 10.1103/PhysRevB.43.12668 en
heal.identifier.secondary http://dx.doi.org/10.1103/PhysRevB.43.12668 en
heal.publicationDate 1991 en
heal.abstract It has been established by the Raman studies of Raptis, McGreevy, and Sequier [Phys. Rev. B 39, 7996 (1989)], and Hahn and Unruh (preceding paper [Phys. Rev. B 43, 12 665 (1991)]) that CaBr2 undergoes a temperature-induced second-order phase transition (D2h-D4h) associated with a soft mode of the lower-symmetry phase. In our studies, detailed high-resolution Raman measurements (down to a low-frequency limit of 10 cm-1) in CaBr2 and its isomorphous CaCl2 over wide temperature ranges (especially in the case of CaCl2) above Tc have not revealed any soft-mode behavior, implying that the soft mode is Raman inactive in the higher-symmetry phase. This experimental evidence justifies, on the whole, the assignment of Raman modes made by Raptis, McGreevy, and Seguier, which has been partly disputed by Hahn and Unruh. © 1991 The American Physical Society. en
heal.journalName Physical Review B en
dc.identifier.doi 10.1103/PhysRevB.43.12668 en
dc.identifier.volume 43 en
dc.identifier.issue 15 en
dc.identifier.spage 12668 en
dc.identifier.epage 12669 en


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