On the origin of transverse incoherence in Z-contrast STEM.

@article{Rafferty2001OnTO,
  title={On the origin of transverse incoherence in Z-contrast STEM.},
  author={B Rafferty and Peter D Nellist and S. John Pennycook},
  journal={Journal of electron microscopy},
  year={2001},
  volume={50 3},
  pages={227-33}
}
We use a Bloch wave approach to further investigate the origins of the incoherent nature of Z-contrast imaging using an ADF detector in a STEM. We discuss how, although at high angles the collected electrons will be mostly thermally scattered in addition to the elastic scattering, it is not the thermal scattering that destroys the coherence, rather the combination of the large detector with the high-angle elastic scattering. This incoherent nature of the elastic scattering arises through the… CONTINUE READING

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