High-Density Liquidlike Component Facilitates Plastic Flow in a Model Amorphous Silicon System Academic Article uri icon

abstract

  • 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.

author list (cited authors)

  • Demkowicz, M. J., & Argon, A. S.

citation count

  • 84

publication date

  • July 2004