Abstract
The role of the local field, anharmonicity, and degree of disorder in the formation of the boson peak has been studied. The low-frequency Raman spectrum of a model polymethylmethacrylate crystal with disorder elements was calculated using the method of atom-atom potentials taking into account the effect of local fields on the spectrum. The calculations were carried out for a crystal containing rigid molecules of an isotactic polymethylmethacrylate oligomer and for a structure with flexible molecules.
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Original Russian Text © M.A. Korshunov, V.F. Shabanov, 2016, published in Avtometriya, 2016, Vol. 52, No. 6, pp. 61–66.
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Korshunov, M.A., Shabanov, V.F. Boson peak in low-frequency Raman spectra of polymethylmethacrylate. Optoelectron.Instrument.Proc. 52, 580–584 (2016). https://doi.org/10.3103/S875669901606008X
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DOI: https://doi.org/10.3103/S875669901606008X