High-density liquidlike component facilitates plastic flow in a model amorphous silicon system. Academic Article uri icon


  • Molecular dynamics simulations show that plastic deformation of amorphous Si modeled by the Stillinger-Weber potential is very sensitive to the density of the initial unstressed state. Low-density systems exhibit a pronounced yield phenomenon, strain softening, and a dramatic drop in pressure during deformation at a constant volume. This behavior is explained by the presence in every system of a certain concentration of solidlike and liquidlike components, the latter being denser and more amenable to plastic flow.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Demkowicz, M. J., & Argon, A. S.

citation count

  • 95

complete list of authors

  • Demkowicz, MJ||Argon, AS

publication date

  • July 2004