Figure 4: Domain wall velocities and defect pinning.
From: Revealing the role of defects in ferroelectric switching with atomic resolution
(a) A contour map of the domain outline at each time step with the colour corresponding to the domain wall velocity. Line profiles for the initial vertical velocity and lateral velocity versus time of the left domain wall are overlaid. In both cases, a pinning event is highlighted by a white arrow. Scale bar, 50 nm. (b) A high-resolution high-angle annular dark-field image of a defect (labelled in the inset in a) corresponding to the pinned region of the lateral domain wall. (c) The same image filtered in Fourier space (inset) by including only the (h00) lattice plane frequencies. Scale bars, 5 nm (b and c). The labelled ‹100›a dislocation cores are magnified in panels d and e (scale bars, 1 nm).
