  The development of four-dimensional (4D) scanning transmission electron
microscopy (STEM) using fast detectors has opened-up new avenues for addressing
some of long-standing challenges in electron imaging. One of these challenges
is how to image severely distorted crystal lattices, such as at a dislocation
core. Here we introduce a new 4D-STEM technique, called Cepstral STEM, for
imaging disordered crystals using electron diffuse scattering. Local
fluctuations of diffuse scattering are captured by scanning electron
nanodiffraction (SEND) using a coherent probe. The harmonic signals in electron
diffuse scattering are detected through Cepstral analysis and used for imaging.
By integrating Cepstral analysis with 4D-STEM, we demonstrate that information
about the distortive part of electron scattering potential can be separated and
imaged at nm spatial resolution. We apply our technique to the analysis of a
dislocation core in SiGe and lattice distortions in high entropy alloy.
