Abstract
Inelastic neutron scattering spectra of the strong glassformer B2O3 show the existence of a crossover temperature Tc for the glass forming liquid, above which the fast dynamics becomes nearly temperature independent. In that interpretation one is forced to conclude that the crossover temperature is above the melting point (Tm = 725 K) in this substance. We have been able to unravel the eigenvectors of the motion from the Q dependence of the spectra. The comparison with the Debye expectation supports an interpretation of the boson peak as a crossover in the dynamics from sound waves to different kind of vibrations, possibly localized ones.
Original language | English |
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Pages (from-to) | 383-385 |
Number of pages | 3 |
Journal | Physica B: Physics of Condensed Matter |
Volume | 234-236 |
DOIs | |
State | Published - Jun 2 1997 |
Externally published | Yes |
Keywords
- Coherent scattering
- Glass transition
- Phonon density of states
- Time of flight