Role of low-frequency vibrations on sound propagation in glasses at intermediate temperature

Article

关键词: POLYCRYSTALLINE METALS;    ACOUSTIC PROPERTIES;    ELASTIC PROPERTIES;    DISORDERED MATTER;    TUNNELING SYSTEMS;    AMORPHOUS SOLIDS;    DYNAMICS;    SCATTERING;    TRANSITION;    RELAXATION;   

DOI  :  10.1103/PhysRevB.61.8778

来源: SCIE

【 摘 要 】

We report measurements of the temperature dependence of the sound attenuation and the fractional change in sound velocity for the glass (G) and orientational-glass (OG) phases of polymorphic ethanol. Strikingly similar behaviors are found for both phases despite the OG's underlying crystal (bcc) lattice. Such similarity, which is also revealed in dielectric spectroscopy and inelastic neutron scattering measurements, suggests whole molecule small-angle librations as a common microscopic origin for a wide variety of ''glassy'' phenomena.

【 授权许可】

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