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

Raptis, C; McGreevy, RL

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	https://dspace.lib.ntua.gr/xmlui/handle/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