Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2002-02-07
J. Chem. Phys. 117, 3289 (2002)
Physics
Condensed Matter
Soft Condensed Matter
RevTeX4, 7 pages, 8 eps figures
Scientific paper
10.1063/1.1493774
The depolarized light scattering spectra of the glass forming liquid ortho-terphenyl have been calculated in the low frequency region using molecular dynamics simulation. Realistic system's configurations are produced by using a recent flexible molecular model and combined with two limiting polarizability schemes, both of them using the dipole-induced-dipole contributions at first and second order. The calculated Raman spectral shape are in good agreement with the experimental results in a large temperature range. The analysis of the different contributions to the Raman spectra emphasizes that the orientational and the collision-induced (translational) terms lie on the same time-scale and are of comparable intensity. Moreover, the cross terms are always found to be an important contribution to the scattering intensity.
Mossa Stefano
Ruocco Giancarlo
Sampoli Marco
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