Raman scattering measurements of vitreous SiO2 were performed over a wide range of temperatures in order to study the behavior of the boson peak and the quasielastic scattering. The analysis of quasielastic contribution in the framework of the Jäckle model demonstrates that the quasielastic excess and the acoustic attenuation have the same physical origin. Moreover and even more importantly we found that the boson peak decrease, which is observed at increasing temperature, is fully explained by the modification of the elastic constants.
Effect of temperature on the vibrational density of states in vitreous SiO2: a Raman study / Caponi, Silvia; Fontana, Aldo; Rossi, Flavio; Baldi, Giacomo; Fabiani, E.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 76:9(2007), pp. 092201-1-092201-4. [10.1103/PhysRevB.76.092201]
Titolo: | Effect of temperature on the vibrational density of states in vitreous SiO2: a Raman study | |
Autori: | Caponi, Silvia; Fontana, Aldo; Rossi, Flavio; Baldi, Giacomo; Fabiani, E. | |
Autori Unitn: | ||
Titolo del periodico: | PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS | |
Anno di pubblicazione: | 2007 | |
Numero e parte del fascicolo: | 9 | |
Codice identificativo Scopus: | 2-s2.0-67549091709 | |
Codice identificativo WOS: | WOS:000249786100010 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevB.76.092201 | |
Handle: | http://hdl.handle.net/11572/69395 | |
Citazione: | Effect of temperature on the vibrational density of states in vitreous SiO2: a Raman study / Caponi, Silvia; Fontana, Aldo; Rossi, Flavio; Baldi, Giacomo; Fabiani, E.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 76:9(2007), pp. 092201-1-092201-4. [10.1103/PhysRevB.76.092201] | |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
File in questo prodotto:
File | Descrizione | Tipologia | Licenza | |
---|---|---|---|---|
PhysRevB_76_092201.pdf | Versione editoriale (Publisher’s layout) | Tutti i diritti riservati (All rights reserved) | Administrator |