Brillouin neutron scattering of v-GeO2
Abstract
The high-frequency dynamics of v-GeO2 was investigated by inelastic neutron scattering. Neutron experiments were carried out by exploiting both three-axis and time-of-flight techniques as most adequate to selectively access to a wider kinematics region or to higher-resolution characteristics. Experimental evidences of a highly dispersing inelastic peak, with an associated velocity of 3650 m s-1, and an almost dispersionless inelastic structure allowed us to definitely confirm the propagating nature of the high-frequency excitations. The measured data were compared with the results of a molecular-dynamics simulation.
- Publication:
-
EPL (Europhysics Letters)
- Pub Date:
- August 2005
- DOI:
- 10.1209/epl/i2005-10125-0
- Bibcode:
- 2005EL.....71..563B