Fig. 6

(Left) Z-contrast image acquired simultaneously with EEL spectra. The red circles show the position of the La atoms that were used for the affine (drift) correction. (Right) The Z-contrast image after performing the affine (drift) transformation. This figure is the same as the one shown in Fig. 5d. The yellow circles illustrate schematically the positions the La atoms after drift correction. The same affine transformation was applied to the simultaneously acquired spectrum image to reduce drift artifacts. The scale bars are 0.5 nm