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- W1990993608 abstract "The theory of the Raman scattering of light from crystals of the diamond structure is discussed and detailed calculations made of the scattering by germanium, silicon and diamond. The anharmonicity between the normal modes of vibrations gives rise to a broadening of the one-phonon peak. The shape of this peak then depends upon the detailed behaviour of the lifetime and frequency of the long wavelength optic mode. The anharmonicity also introduces a coupling between the one and two-phonon scattering, part of which tends to shift the center of the one phonon Raman peak away from the frequency of the optic mode. Shell models which were fitted to the measured dispersion curves are used to calculate the frequencies of the normal modes of vibration. The one and two-phonon matrix elements for the Raman scattering are evaluated by means of the shell model formalism for these models and the spectra calculated including the effects of anharmonicity on the one phonon scattering. The results which are compared with the available experimental results show that the details of the spectra depend considerably on the polarization of the light and on the orientation of the crystal." @default.
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- W1990993608 date "1965-01-01" @default.
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- W1990993608 title "Raman scattering from crystals of the diamond structure" @default.
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- W1990993608 doi "https://doi.org/10.1051/jphys:019650026011065900" @default.
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