Hyper-Raman scattering observation of the boson peak in vitreous silica

Authors
Hehlen, B Courtens, E Vacher, R Yamanaka, A Kataoka, M Inoue, K
Citation
B. Hehlen et al., Hyper-Raman scattering observation of the boson peak in vitreous silica, PHYS REV L, 84(23), 2000, pp. 5355-5358
Citations number
30
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
84
Issue
23
Year of publication
2000
Pages
5355 - 5358
Database
ISI
SICI code
0031-9007(20000605)84:23<5355:HSOOTB>2.0.ZU;2-M
Abstract
Hyper-Raman spectroscopy is used to investigate low frequency vibrations of various silica glasses. A strong boson peak is observed. The corresponding modes are inactive in infrared and Raman spectra, and are nonacoustic in n ature. The shape of this boson peak essentially matches the total density o f vibrational states (DOS), with a constant coupling coefficient C. This an d other indications suggest that these modes actually dominate the DOS of s ilica.