학술논문
The vibrational dynamics of GeO2 at the glass transition: a Raman and Brillouin scattering study.
Document Type
Article
Source
Subject
*GLASS transition temperature
*GERMANIUM compounds
*RAMAN effect
*BRILLOUIN scattering
*GLASS
*BOSONS
*TEMPERATURE effect
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Language
ISSN
1478-6435
Abstract
New temperature-dependent Brillouin and Raman scattering experiments were performed on vitreous GeO2 in the 10-1200 K 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. [ABSTRACT FROM AUTHOR]