Hard core phonon frequency at transition temperature
| Autor: | S. P. S. Porto, P. da R. Andrade |
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| Rok vydání: | 1974 |
| Předmět: | |
| Zdroj: | Solid State Communications. 14:547-550 |
| ISSN: | 0038-1098 |
| DOI: | 10.1016/0038-1098(74)91008-4 |
| Popis: | A simple theoretical derivation is given to show that one may expect a hard core for the phonon frequency at the transition temperature. This approach implies that the frequency of the phonon will follow ω ∝ {[1 + γ(T − T C )] V 0 } 1 2 instead of that predicted by soft mode theory. Our expression should be valid whenever a Brownian sublattice exists in the crystal. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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