Titlebook: Light Scattering Spectra of Solids; Proceedings of the I George B. Wright Conference proceedings 1969 Springer Science+Business Media New Y

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Second-Order Raman Spectra of Some Zinc Blende and Wurtzite Crystalsf the phonon energies of the individual crystals near the Brillouin-zone boundary. The Raman spectrum of cubic ZnS is examined in most detail and a reasonably complete interpretation of the spectrum is given. In addition, the calculated selection rules for second-order Raman processes at critical po

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Rayleigh and Raman Scattering by Surface Modes in Ionic Crystalsnd (c) Surface modes. The features characterizing the surface modes in crystals of arbitrary shape are[1]: Their frequencies form a series lying in the range between .. and .. (the transverse and longitudinal frequencies) and converging to an intermediate frequency .. which satisfies the relation .(

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Low Frequency Raman Spectra of Ionic Crystalss due to a vanishing low frequency transverse optical mode at q → 0 (soft mode)[1]. An antiferroelectric transition is due to a vanishing zone boundary phonon[2]. Phase transformations induced by pressure are similarly explained as due to a vanishing transverse acoustic phonon[3]. Order-disorder tra

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Theory for the Raman Scattering Tensor for Combination and Overtones quanta or the simultaneous excitation of two vibrations by one quantum each..In order to incorporate the latter process it is necessary to expand [1] the electronic wave functions to second order in the nuclear coordinates; for the former process only the first order terms need to be considered. Th

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Theory of Optical Processes in Liquid Heliuming. In liquid helium, Brillouin scattering [1] has permitted the study of sound waves. It is of interest to ask if the rest (roton part) of the vibrational excitation spectrum observed by neutrons could also be observed in light scattering experiments. To investigate this possibility, we formulate

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