Abstract
To the present several theoretical papers [ 1–4 ] have been devoted to the investigation of bound states in the vibrational spectra of crystals. In these works the opportunity of investigating such states with the help of Raman scattering of light has been discussed. The theory predicts that vibrational bound states (biphonons or vibrational biexcitons for molecular crystals) arise as a result of anharmonicity. According to the results obtained [ 1–4 ] Fermi-resonance with strong anharmonicity is most favorable for the appearance of bound states.
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© 1976 Plenum Press, New York
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Gorelik, V.S., Mitin, G.G., Sushchinskii, M.M. (1976). Polariton Fermi-Resonance in the Raman Spectrum of Ammonium Chloride. In: Bendow, B., Birman, J.L., Agranovich, V.M. (eds) Theory of Light Scattering in Condensed Matter. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-4301-1_9
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DOI: https://doi.org/10.1007/978-1-4613-4301-1_9
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