Abstract
Raman scattering spectra in polymers and phonon sideband spectra observed in hole burning experiments show that the peak frequency of the phonon sideband spectrum corresponds to the low-frequency fracton edge, the so-called boson peak in amorphous materials. The polymer dependence of the phonon sideband spectra indicates that the polymer which has hydrogen bonding has a higher boson peak frequency. The absence of a high-frequency fracton edge in the phonon sideband spectra, which has been observed in the Raman spectra, is attributed to the different frequency dependence of localized-electron-phonon coupling versus dielectric modulation in Raman scattering.
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