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Title

Low-temperature specific heat and glassy dynamics of a polymorphic molecular solid

AuthorsTalon, C.; Ramos, M. A.; Vieira, S. ; Cuello, G. J. ; Bermejo, Francisco Javier ; Criado, A.; Senent, María Luisa ; Bennington, S.M.; Fischer, H. E.; Schober, H.
Issue Date1998
PublisherAmerican Physical Society
CitationPhysical Review B 58: 745-755 (1998)
AbstractThe low-frequency dynamics of different solid phases of ethanol (fully ordered crystal, orientational glass, and true structural glass) is investigated by measurements of low-temperature specific heat as well as determination of the vibrational densities of states by inelastic neutron scattering. Such polymorphism provides a unique benchmark to study the relative importance of different kinds of disorder on glass-dynamics properties. The measurements are carried out both for hydrogenous and fully-deuterated samples. Large isotopic effects are found for the excess contributions (i.e., non-Debye) to the specific heat of the disordered solids, which have clear correlates in the low-frequency spectra.
URIhttp://hdl.handle.net/10261/65451
DOI10.1103/PhysRevB.58.745
Identifiersdoi: 10.1103/PhysRevB.58.745
issn: 0163-1829
Appears in Collections:(CFMAC-IEM) Artículos
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