Low-frequency Raman investigation of the liquid-glass transition in glycerol | Zendy

Seiji Kojima | Zendy

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Low-frequency Raman investigation of the liquid-glass transition in glycerol

Author(s) -

Seiji Kojima

Publication year - 1993

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.47.2924

Subject(s) - physics , raman spectroscopy , depolarization ratio , depolarization , raman scattering , correlation function (quantum field theory) , exponential decay , boson , spectral line , exponential function , condensed matter physics , materials science , atomic physics , nuclear magnetic resonance , molecular physics , optics , nuclear physics , quantum mechanics , dielectric , medicine , mathematical analysis , mathematics , endocrinology

The low-frequency response of glycerol has been studied by polarized Raman scattering. The ‘‘boson peak’’ always appear far above Tg=193 K, whereas the depolarization ratio is nearly constant between 5 cm-1 and 200 cm-1 at temperatures from 333 to 90 K. In the analysis of the boson peak, comparisons are made between experimental results and calculations based on the two types of structural correlation function. The typical behavior of line shape and depolarization ratio of the spectra is fitted with an exponential structural correlation function. The structural correlation length is estimated to be about 14 Å. It may be associated with the mean size of the clusters of hydrogen-bonded molecules

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