5 papers
Low-energy excess of vibrational states in v-SiO2: the role of transverse dynamics
O. Pilla, A. Fontana, J. R. Goncalves +2
The study of the effects of the density variations on the vibrational dynamics in vitreous silica is presented. A detailed analysis of the dynamical structure factor, as well as of…
High frequency acoustic modes in liquid gallium at the melting point
T. Scopigno, A. Filipponi, M. Krisch +3
The microscopic dynamics in liquid gallium (l-Ga) at melting (T=315 K) has been studied by inelastic x-ray scattering. We demonstrate the existence of collective acoustic-like mode…
Evidence of short time dynamical correlations in simple liquids
T. Scopigno, G. Ruocco, F. Sette +1
We report a molecular dynamics (MD) study of the collective dynamics of a simple monatomic liquid -interacting through a two body potential that mimics that of lithium- across the…
Evidence of two viscous relaxation processes in the collective dynamics of liquid lithium
T. Scopigno, U. Balucani, G. Ruocco +1
New inelastic X-ray scattering experiments have been performed on liquid lithium in a wide wavevector range. With respect to the previous measurements, the instrumental resolution,…
The nature of the short wavelength excitations in vitreous silica: X-Rays Brillouin scattering study
O. Pilla, A. Cunsolo, A. Fontana +6
The dynamical structure factor (S(Q,E)) of vitreous silica has been measured by Inelastic X-ray Scattering varying the exchanged wavevector (Q) at fixed exchanged energy (E) - an e…