The vibrational dynamics of GeO2 at the glass transition: a Raman and Brillouin scattering study
| Autor: | Marco Zanatta, Silvia Caponi, R. Dal Maschio, Flavio Rossi, Giacomo Baldi, Aldo Fontana, L. Orsingher |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Condensed matter physics
Chemistry Atmospheric temperature range Condensed Matter Physics glasses Molecular physics Brillouin zone Brillouin light scattering symbols.namesake Brillouin scattering Phenomenological model symbols sound velocity Glass transition Raman spectroscopy Raman scattering Germanium oxide |
| Zdroj: | Philosophical magazine (2003, Print) 91 (2011): 1910–1916. doi:10.1080/14786435.2010.533136 info:cnr-pdr/source/autori:Rossi, Flavio; Baldi, Giacomo; Caponi, Silvia; Dal Maschio, Roberto; Fontana, Aldo; Orsingher, Laura; Zanatta, Marco/titolo:The vibrational dynamics of GeO2 at the glass transition: a Raman and Brillouin scattering study/doi:10.1080%2F14786435.2010.533136/rivista:Philosophical magazine (2003, Print)/anno:2011/pagina_da:1910/pagina_a:1916/intervallo_pagine:1910–1916/volume:91 |
| DOI: | 10.1080/14786435.2010.533136 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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