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Hard sphere-like dynamics in a non hard sphere liquid
T. Scopigno, R. Di Leonardo, L. Comez +3
The collective dynamics of liquid Gallium close to the melting point has been studied using Inelastic X-ray Scattering to probe lengthscales smaller than the size of the first coor…
High frequency dynamics in a monatomic glass
T. Scopigno, R. Di Leonardo, G. Ruocco +4
The high frequency dynamics of glassy Selenium has been studied by Inelastic X-ray Scattering at beamline BL35XU (SPring-8). The high quality of the data allows one to pinpoint the…
Non-Equilibrium Thermodynamic Description of the Coupling between Structural and Entropic Modes in Supercooled Liquids
R. Di Leonardo, A. Taschin, M. Sampoli +2
The density response of supercooled glycerol to an impulsive stimulated thermal grating (q=0.63 micron^-1) has been studied in the temperature range (T=200-340 K) where the structu…
Topological Description of the Aging Dynamics in Simple Glasses
L. Angelani, R. Di Leonardo, G. Parisi +1
We numerically investigate the aging dynamics of a monatomic Lennard-Jones glass, focusing on the topology of the potential energy landscape which, to this aim, has been partitione…
Intra-molecular origin of the fast relaxations observed in the Brillouin light scattering spectra of molecular glass-formers
G. Monaco, S. Caponi, R. Di Leonardo +2
The Brillouin light scattering spectra of the o-terphenyl single crystal are compared with those of the liquid and the glass phases. This shows: i) the direct evidence of a fast re…
Saddles in the energy landscape probed by supercooled liquids
L. Angelani, R. Di Leonardo, G. Ruocco +2
We numerically investigate the supercooled dynamics of two simple model liquids exploiting the partition of the multi-dimension configuration space in basins of attraction of the s…
Off-Equilibrium Effective Temperature in Monatomic Lennard-Jones Glass
R. Di Leonardo, L. Angelani, G. Parisi +1
The off-equilibrium dynamics of a monatomic Lennard-Jones glass is investigated after sudden isothermal density jumps (crunch) from well equilibrated liquid configurations towards…
Relaxation processes in harmonic glasses?
G. Ruocco, F. Sette, R. Di Leonardo +4
A relaxation process, with the associated phenomenology of sound attenuation and sound velocity dispersion, is found in a simulated harmonic Lennard-Jones glass. We propose to iden…