Light scattering at the liquid to glass transition

M. Fuchs, A. Latz
<span title="1991-11-15">1991</span> <i title="AIP Publishing"> <a target="_blank" rel="noopener" href="" style="color: black;">Journal of Chemical Physics</a> </i> &nbsp;
Light scattering in a viscoelastic liquid is studied. The change from liquid to solid-like Brillouin spectra is explained using frequency dependent elasto-optic constants. Within a standard dielectric model microscopic formulas for these generalized frequency dependent constants and the spectra are obtained. The phenomenological pictures of light scattering in an amorphous solid and in a liquid are obtained as high and low frequency limits. The observation of a Rytov Dip in a system of
more &raquo; ... isotropic particles is predicted for slow enough viscoelastic relaxation. Approximations using the Mode Coupling Theory allow the spectra to be expressed in terms of density fluctuations alone. The predictions of this theory for the spectra are discussed. 7074 J. Chem. Phys. 95 (lo),
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1063/1.461436</a> <a target="_blank" rel="external noopener" href="">fatcat:eivq3uuaozemhcep53tv3k5bpm</a> </span>
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