New temperature-dependent Brillouin and Raman scattering experiments were performed on vitreous GeO2 in the 10–1200K temperature range. We found that, while the sound velocity above room temperature slightly increases (2–3%), the frequency of the Boson peak maximum shows unexpected behavior, decreasing by more than 15% when the temperature is increased. The results are interpreted in the framework of a phenomenological model.
The vibrational dynamics of GeO2 at the glass transition: a Raman and Brillouin scattering study / Rossi, Flavio; Baldi, Giacomo; Caponi, S.; Dal Maschio, Roberto; Fontana, Aldo; Orsingher, L.; Zanatta, Marco. - In: PHILOSOPHICAL MAGAZINE. - ISSN 1478-6443. - 91:13-15(2011), pp. 1910-1916. [10.1080/14786435.2010.533136]
The vibrational dynamics of GeO2 at the glass transition: a Raman and Brillouin scattering study
Rossi, Flavio;Baldi, Giacomo;Caponi, S.;Dal Maschio, Roberto;Fontana, Aldo;Orsingher, L.;Zanatta, Marco
2011-01-01
Abstract
New temperature-dependent Brillouin and Raman scattering experiments were performed on vitreous GeO2 in the 10–1200K temperature range. We found that, while the sound velocity above room temperature slightly increases (2–3%), the frequency of the Boson peak maximum shows unexpected behavior, decreasing by more than 15% when the temperature is increased. The results are interpreted in the framework of a phenomenological model.| File | Dimensione | Formato | |
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