Frequency behavior of Raman coupling coefficient in glasses
Physical Review B - Condensed Matter and Materials Physics, ISSN: 0163-1829, Vol: 66, Issue: 5, Page: 542051-542056
2002
- 84Citations
- 31Captures
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Article Description
The low-frequency Raman coupling coefficient C(v) of 11 different glasses is evaluated. It is shown that the coupling coefficient demonstrates a universal linear frequency behavior C(v)∞(v/v+B) near the boson peak maximum v. The frequency dependence of C(v) allows us to separate the glasses studied into two groups: the first group has a frequency independent contribution B∼0.5, while the second one has B∼0. It was found that C(v) demonstrates a superlinear behavior at very low frequencies. This observation suggests a vanishing of the coupling coefficient when frequency tends to zero.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0036695716&origin=inward; http://dx.doi.org/10.1103/physrevb.66.054205; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85038944757&origin=inward; https://link.aps.org/doi/10.1103/PhysRevB.66.054205; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.66.054205/fulltext; http://link.aps.org/article/10.1103/PhysRevB.66.054205
American Physical Society (APS)
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