PHONONS IN A SIMPLE MONATOMIC MODEL OF METALLIC-GLASS

A molecular dynamics simulation is presented which investigates vibrat ional dynamics in a simple monatomic model of a glassy state possessin g pronounced icosahedral local order similar to that of metallic glass es. Both the dynamical structure factor of that model and its density of states reveal the pattern of phonon behavior distinctly different f rom what has been observed in other simulated amorphous systems as wel l as in laboratory experiments on metallic glasses.