Frequency behavior of Raman coupling coefficient in glasses

Details Frequency behavior of Raman coupling coefficient in glasses Frequency behavior of Raman coupling coefficient in glasses

2002-06-16

arxiv.org/abs/cond-mat/0206295v1

Physics

Condensed Matter

Materials Science

8 pages, 9 figures

Scientific paper

10.1103/PhysRevB.66.054205

Low-frequency Raman coupling coefficient of 11 different glasses is evaluated. It is found that the coupling coefficient demonstrates a universal linear frequency behavior near the boson peak maximum and a superlinear behavior at very low frequencies. The last observation suggests vanishing of the coupling coefficient when frequency tends to zero. The results are discussed in terms of the vibration wavefunction that combines features of localized and extended modes.

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