DEPOLARIZED LIGHT-SCATTERING-STUDIES OF THE BOSON PEAK AND THE TRANSVERSAL PHONONS IN A GLASS-FORMING LIQUID - OTP

Authors
STEFFEN W ZIMMER B PATKOWSKI A MEIER G FISCHER EW
Citation
W. Steffen et al., DEPOLARIZED LIGHT-SCATTERING-STUDIES OF THE BOSON PEAK AND THE TRANSVERSAL PHONONS IN A GLASS-FORMING LIQUID - OTP, Journal of non-crystalline solids, 172, 1994, pp. 37-42
Citations number
17
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of non-crystalline solids → ACNP
ISSN journal
00223093
Volume
172
Year of publication
1994
Part
1
Pages
37 - 42
Database
ISI
SICI code
0022-3093(1994)172:<37:DLOTBP>2.0.ZU;2-D
Abstract
A lineshape analysis of the Rayleigh wing of ortho-terphenyl obtained by low frequency Raman spectroscopy has been performed. The so-called boson peak was studied from 100 to 300 K, from far below to above the glass transition at T-g = 244 K. A model of disorder-induced scatterin g was used to interpret the features of the boson peak. A complementar y measurement of the transversal phonons of OTP was done in the temper ature range from 250 to 360 K. It was found that the shear waves are o nly present up to 320 K.