Using molecular dynamics simulation, we investigate the dynamics of stacking faults in fcc crystals in uniaxial stretching in a Lennard-Jones binary mixture composed of 4096 particles in three dimensions. We visualize stacking faults using a disorder variable Dj(t) for each particle j constructed from local bond order parameters based on spherical harmonics (Steinhardt order parameters). Also introducing a method of bond breakage, we examine how stacking faults are formed and removed by collective particle motions. These processes are relevant in plasticity of fcc crystals.
@article{arxiv.1103.1051,
title = {Visualization of stacking faults in fcc crystals in plastic deformations},
author = {Takeshi Kawasaki and Akira Onuki},
journal= {arXiv preprint arXiv:1103.1051},
year = {2011}
}