Abstract
The low-frequency Raman coupling coefficient (formula presented) of 11 different glasses is evaluated. It is shown that the coupling coefficient demonstrates a universal linear frequency behavior (formula presented) near the boson peak maximum (formula presented) The frequency dependence of (formula presented) allows us to separate the glasses studied into two groups: the first group has a frequency independent contribution (formula presented) while the second one has (formula presented) It was found that (formula presented) demonstrates a superlinear behavior at very low frequencies. This observation suggests a vanishing of the coupling coefficient when frequency tends to zero.
| Original language | English |
|---|---|
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 66 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2002 |
| Externally published | Yes |