11/1/2023 0 Comments Atomic mail verifier uncertainThe precision of determining the position of atomic columns is compared between STEM data acquired using standard acquisition, and STEM-images obtained as an image stack averaged after using non-rigid registration. Using annular bright field images, shifts in oxygen column positions are also quantified in the same heterostructure. From this, we can extract changes in the lattice parameters and shape of A-cation columns from annular dark field images of perovskite oxide heterostructures. By first fitting the most intense atomic columns and then subtracting them, information on all the projected sublattices can be obtained. The software is tested on variants of the perovskite oxide structure. In this work, we present a free and open source software tool for analysing both the position and shapes of atomic columns in STEM-images, using 2-D elliptical Gaussian distributions. Often, this information is hard to extract, due to the large number of atomic columns and large differences in intensity from sublattices consisting of different elements. Scanning transmission electron microscopy (STEM) data with atomic resolution can contain a large amount of information about the structure of a crystalline material.
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