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. 2020 Mar 13;11:1391. doi: 10.1038/s41467-020-15159-2

Fig. 2. Atomic structure of HZO orthorhombic phase.

Fig. 2

a Scanning transmission electron microscopy high-angle annular dark-field (STEM-HAADF) image of the HZO grain projected along O [010] zone axes with the inset of simulated HAADF picture. Scale bar, 1 nm. b The corresponding scanning transmission electron microscopy high-angle annular dark-field annular bright-field (STEM-ABF) image of (a) with the inset of simulated ABF picture. Scale bar, 1 nm. c Schematic of the unit cell of HZO, where DO denotes the relative displacement of O atoms. d O atomic displacement vector map from the area in (b). The yellow arrows indicate reversed O atom displacement (DO) vectors, which were consistent with the spontaneous polarization direction in (b). e Two-dimensional O atomic displacement map relative to the central positions of the four nearest heavy atoms, which corresponds to the yellow arrows in (d).