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 GeO2at the glass transition: a Raman and Brillouin scattering study

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.
2011
glasses
sound velocity
Brillouin light scattering
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/950368
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