http://www.cnr.it/ontology/cnr/individuo/prodotto/ID180373
Acoustic Dissipation and Density of States in Liquid, Supercooled, and Glassy Glycerol (Articolo in rivista)
- Type
- Label
- Acoustic Dissipation and Density of States in Liquid, Supercooled, and Glassy Glycerol (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevLett.106.155701 (literal)
- Alternative label
L. Comez;1,2 G. Monaco;3 C. Masciovecchio;4 A. Paciaroni;2 A. Gessini;4 F. Scarponi;2 G. Ruocco;5 and D. Fioretto2 (2011)
Acoustic Dissipation and Density of States in Liquid, Supercooled, and Glassy Glycerol
in Physical review letters
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- L. Comez;1,2 G. Monaco;3 C. Masciovecchio;4 A. Paciaroni;2 A. Gessini;4 F. Scarponi;2 G. Ruocco;5 and D. Fioretto2 (literal)
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- Rivista
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- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1IOM-CNR, c/o Universita` di Perugia, I-06123, Perugia, Italy
2Dipartimento di Fisica, Universita` di Perugia, I-06123, Perugia, Italy
3European Syncrotron Radiation Facility, B.P. 220 F-38043, Grenoble, France
4Sincrotrone Trieste, Area Science Park - 34012 Basovizza Trieste, Italy
5Dipartimento di Fisica, Universita` di Roma ''La Sapienza,'' P. A. Moro 2, I-00185 Roma, Italy (literal)
- Titolo
- Acoustic Dissipation and Density of States in Liquid, Supercooled, and Glassy Glycerol (literal)
- Abstract
- Combined Brillouin spectra collected at visible, ultraviolet, and x-ray frequencies are used to
reconstruct the imaginary part of the acoustic compliance J'' over a wide frequency range between
0.5 GHz and 5 THz. For liquid, supercooled, and glassy glycerol, J'' is found to be linearly dependent on
the tagged-particle susceptibility measured by incoherent neutron scattering up to 1 THz, giving
evidence of a clear relation between acoustic power dissipation and density of states. A simple but
general formalism is presented to quantitatively explain this relation, thus clarifying the connection
between the quasielastic component observed in neutron scattering experiments and the fast relaxation
dynamics probed by Brillouin scattering. (literal)
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