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Using molecular dynamics simulation, we investigate the dynamics of stackingfaults in fcc crystals in uniaxial stretching in a Lennard-Jones binary mixturecomposed of 4096 particles in three dimensions. We visualize stacking faultsusing a disorder variable $D_j(t)$ for each particle $j$ constructed from localbond order parameters based on spherical harmonics (Steinhardt orderparameters). Also introducing a method of bond breakage, we examine howstacking faults are formed and removed by collective particle motions. Theseprocesses are relevant in plasticity of fcc crystals.

Visualization of stacking faults in fcc crystals in plastic deformations