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dc.contributor.authorGvasaliya, S.N.
dc.contributor.authorFedoseev, A. I.
dc.contributor.authorLushnikov, Sergey G.
dc.contributor.authorSchmidt, V. Hugo
dc.contributor.authorTuthill, G. F.
dc.contributor.authorShuvalov, L. A.
dc.date.accessioned2019-02-04T17:09:03Z
dc.date.available2019-02-04T17:09:03Z
dc.date.issued2001
dc.identifier.citationS.N. Gvasaliya, A.I. Fedoseev, S.G. Lushnikov, V.H. Schmidt, G.F. Tuthill, and L.A. Shuvalov, “Acoustic anomalies at phase transformation to quasi-2D proton glass state in Cs5H3(SO4)4.xH2O crystal,” Journal of Physics: Condensed Matter 13, 3677-3688 (2001). doi: 10.1088/0953-8984/13/15/311en_US
dc.identifier.issn0953-8984
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/15202
dc.description.abstractThe paper describes Brillouin light scattering studies of longitudinal acoustic (LA) phonons in Cs5H3(SO4)4×x H2O (PCHS) crystals at temperatures from 100 K to 360 K. The acoustic response of the crystal at different frequencies is analysed in detail. It is shown that both the velocity and damping of sound exhibit a strong dispersion caused by relaxation processes in the region of transformation into the glass-like phase (Tg≈260 K). A strong anisotropy in the acoustic response, attributable to the quasi-two dimensional (quasi-2D) structure of PCHS, is revealed. The LA phonon damping is calculated in the framework of a number of relaxation models. It is shown that, in the vicinity of Tg, anomalies in ultrasonic damping of the LA phonons propagating in the basal plane reflect the cooperative effect of freezing of acid protons. At the same time, the anomaly in damping of the LA phonon propagating perpendicular to the basal plane is described in terms of the Debye model and is due to the interaction between protons on hydrogen bonds and LA phonons. This suggests that the proton glass state realized at T<Tg is of quasi-2D nature.en_US
dc.description.sponsorshipRussian Foundation for Basic Research (Grant 99-02-18356); National Science Foundation (Grant DMR-9805272).en_US
dc.language.isoenen_US
dc.rightsThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en_US
dc.titleAcoustic anomalies at phase transformation to quasi-2D proton glass state in Cs5H3(SO4)4.xH2O crystalen_US
dc.typeArticleen_US
mus.citation.extentfirstpage3677en_US
mus.citation.extentlastpage3688en_US
mus.citation.issue15en_US
mus.citation.journaltitleJournal of Physics: Condensed Matteren_US
mus.citation.volume13en_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.identifier.doi10.1088/0953-8984/13/15/311en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentPhysics.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage8en_US


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