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High frequency excitations in a molecular glass |
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| Authors: | D. Martin-Marero F. J. Bermejo J. L. Martinez F. Batallan M. Garcí a-Hern ndez F. J. Mompean |
| Affiliation: | a Instituto de Estructura de la Materia, C.S.I.C., Serrano 119, E-28006 Madrid Spain b Institut Laue Langevin, 156X, F-38042 Grenoble, Cedex France c Instituto de Ciencia de Materiales, C.S.I.C., Serrano 144, E-28006 Madrid Spain d ISIS Pulsed Neutron Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OxonOX110QX UK |
| Abstract: | Neutron inelastic triple-axis spectra of CD3OD/6%D2O in the glassy and liquid phases are reported. Both the dispersion and damping of the sound modes show characteristic features as the temperature is lowered to the glassy regime. Furthermore, analysis of the observed scattering intensities reveals the presence in the glass of a second component centred at zero frequency which is not observed in the liquid. |
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