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To date, high-resolution electron microscopy has largely relied on using thephase of the exit wave function at the exit surface to form a high-resolutionelectron microscopic image. We have for the first time used chromaticaberration correction to implement a new imaging mode to achieve amplitudecontrast imaging in high-resolution electron microscopy, allowing us to obtaindirectly interpretable high-resolution electron microscopic images withdiscrimination between light and heavy atomic columns. Using this imagingapproach, we have successfully visualized the atomic structure in aBaTiO3/CaTiO3 superlattice with high spatial accuracy and discriminationbetween Ba and Ca columns, providing direct visualization of the Ca and Baassociated oxygen octahedral tilt that controls ferroelectric behavior in thesesuperlattice structures. Furthermore, this approach offers new opportunities tounravel the structure in a wide range of materials, especially complex oxideswith exotic behaviors based on specific structural arrangements.

Amplitude Contrast Imaging in High-Resolution Transmission Electron Microscopy of Ferroelectric Superlattice Film