Fig. 4 | Nature Communications

Fig. 4

From: Three-dimensional atomic scale electron density reconstruction of octahedral tilt epitaxy in functional perovskites

Fig. 4

Room temperature evolution of β angles across interfaces. High resolution annular bright field scanning transmission electron microscopy (ABF-STEM) images with oxygen atoms at room temperature for a CaTiO3/NdGaO3, b CaTiO3/DyScO3, c CaTiO3/LSAT along [010]pc (b-axis) zone axis. Different unit cells are labeled by numbers on the right side of the STEM images. The scale bar is 5 Å. The β angles (blue lines) resolved by STEM for different unit cells along c direction are plotted in d, e, and f, respectively for above systems. As comparison, room temperature coherent Bragg rods analysis (COBRA) data are plotted using blue dots. Experimental errors for STEM (line shaded area) are taken to be the standard deviation of the β values along a-axis over around 20 unit cells. The errors for COBRA data (light blue shaded area) are obtained by comparing substrates β values to their bulk reference

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