| Autor: |
Grishaev, V. I., Mamaluı˘, M. A., Minaev, P. A., Syrkin, E. S., Feodos’ev, S. B. |
| Předmět: |
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| Zdroj: |
Low Temperature Physics; Nov2001, Vol. 27 Issue 11, p952, 6p, 9 Graphs |
| Abstrakt: |
It is shown that the interaction between vibrational modes polarized parallel and perpendicular to the layers in a strongly anisotropic layered crystal is very weak for frequencies above the van Hove frequency, which corresponds to a transition from closed isofrequency surfaces to surfaces which are open in the weak-coupling direction. Such mode quasisplitting results in quasi-two-dimensional behavior of phonons polarized along layers and quasi-one-dimensional behavior of phonons polarized in a direction perpendicular to the layers and localized near light or strongly coupled impurity atoms or monolayers. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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