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 ms(-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.
Brillouin neutron scattering of v-GeO2 / Bove, L. E.; Fabiani, E.; Fontana, A.; Paoletti, Francesco; Petrillo, C.; Pilla, O.; Bento, I. C. V.. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - ELETTRONICO. - 71:4(2005), pp. 563-569. [10.1209/epl/i2005-10125-0]
Brillouin neutron scattering of v-GeO2
Bove, L. E.
;PAOLETTI, FRANCESCO;
2005
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 ms(-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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
