Fig. 4From: Material structure, properties, and dynamics through scanning transmission electron microscopyLocal symmetry inside nanodomains of an alkali niobate lead-free ceramic. a STEM HAADF image at a domain boundary; b peak finding on a revealing rhombohedral (R) and tetragonal (T) regions; c enlarged image of the region in a within the blue box, showing T symmetry; d enlarged image of the region in b within the yellow box, showing R symmetry; e, f schematics showing projected atom displacements for T and R symmetry; g, h displacements along x- and y-axes; the region exhibiting displacement along only one axis reflects T symmetry, while the region exhibiting displacement along both x- and y-axes reflects R symmetry. i, j 2D and 3D images showing displacement along the diagonal direction, reflecting different regions with T and R symmetries. Reproduced from Wu et al. 2016. Copyright 2016 American Chemical SocietyBack to article page