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VOLUME 45 (1987) | ISSUE 7 | PAGE 347
Raman scattering by surface vibrations of germanium crystals
An additional line which has been discovered in the spectrum of the Raman scattering of light by optical phonons in germanium stems from a vibration that is localized near the surface of the crystal. The reasons for the appearance of a vibration of this type are analyzed on the basis of an anharmonicity of optical vibrations. Relaxation of atomic layers near the surface is taken into account.