Motion of a step in a singular high-angle tilt grain boundary in gold (Au) at 217 °C

Series of images derived from *.dm files showing the random motion of the step, played back with each individual frame (total 20 fps displayed). Median filtering with a 5 frame long sliding filter applied for fast event detection. False coloring highlight order parameter with 6 rotations around nearest neighbors; one orientation is red, the other is blue. Green/yellow/orange show boundary atoms that do not fully belong to one lattice or the other.