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Correcting the linear and nonlinear distortions for atomically resolved STEM spectrum and diffraction imaging.

Yi Wang1, Y Eren Suyolcu1, Ute Salzberger1

  • 1Stuttgart Center for Electron Microscopy, Max Planck Institute for Solid State Research, Stuttgart, Germany.

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Summary

Scanning transmission electron microscopy (STEM) images suffer from distortions due to specimen drift and scan inaccuracies. A new software tool corrects these linear and nonlinear distortions, improving image interpretability.

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Area of Science:

  • Materials Science
  • Microscopy
  • Data Analysis

Background:

  • Scanning transmission electron microscopy (STEM) is susceptible to image distortions caused by specimen and stage drift, as well as scan inaccuracies.
  • These distortions, including linear and nonlinear effects, are exacerbated in STEM spectrum and diffraction imaging due to longer pixel dwell times.
  • Such distortions manifest as lattice expansion, compression, or shearing, hindering atomic resolution and data interpretation.

Purpose of the Study:

  • To develop and report a software tool for correcting image distortions in STEM.
  • To address both linear and nonlinear distortions in atomically resolved 3D spectrum imaging and 4D diffraction imaging data.

Main Methods:

  • Post-correction of linear and nonlinear image distortions using a novel software tool.
  • Application of the tool to STEM spectrum imaging and 4D diffraction imaging datasets.

Main Results:

  • The software effectively corrects linear and nonlinear distortions in STEM spectrum and diffraction imaging.
  • Improved clarity and accuracy of crystal lattice representation in corrected images.
  • Enhanced atomic resolution and interpretability of distorted STEM datasets.

Conclusions:

  • The developed software tool significantly improves the quality and interpretability of distorted STEM spectrum and diffraction imaging data.
  • This advancement is crucial for accurate analysis and understanding of materials at the atomic scale using advanced STEM techniques.