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Progress and new advances in simulating electron microscopy datasets using MULTEM.

I Lobato1, S Van Aert1, J Verbeeck1

  • 1EMAT, University of Antwerp, Department of Physics, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.

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Summary
This summary is machine-generated.

The MULTEM open-source program now features a graphical user interface and enhanced simulation capabilities for electron microscopy, significantly speeding up calculations for scanning transmission electron microscopy and energy filtered transmission electron microscopy.

Keywords:
Electron scattering factorsFrozen phonon calculationsGPU calculationsInelastic scatteringMultislice simulations

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Area of Science:

  • Materials Science
  • Computational Physics
  • Chemistry

Background:

  • Open-source software is crucial for advancing scientific research.
  • Accurate simulations are essential for interpreting experimental data in electron microscopy.
  • Previous versions of MULTEM lacked advanced features for modern simulation needs.

Purpose of the Study:

  • To introduce a significantly enhanced version of the MULTEM open-source program.
  • To improve the efficiency and scope of electron microscopy simulations.
  • To provide researchers with advanced tools for analyzing materials at the nanoscale.

Main Methods:

  • Development of a new graphical user interface for MULTEM.
  • Implementation of tapering truncation for atomic potentials.
  • Integration of CPU multithreading for faster computations.
  • Addition of single/double precision calculation options.
  • Development of advanced simulation modules for scanning transmission electron microscopy (STEM), imaging STEM (ISTEM), energy filtered transmission electron microscopy (EFTEM), and STEM electron energy loss spectroscopy (EELS).
  • Introduction of a mixed channeling approach for inelastic excitation calculations.

Main Results:

  • The new MULTEM version offers a user-friendly graphical interface.
  • Enhanced simulation capabilities include ISTEM, EFTEM, and STEM-EELS with experimental detector sensitivities.
  • The mixed channeling approach significantly accelerates EFTEM and STEM-EELS calculations.
  • Improved algorithms and multithreading enhance computational efficiency.

Conclusions:

  • The updated MULTEM program provides a powerful and efficient platform for advanced electron microscopy simulations.
  • The new features and computational speed-ups will benefit researchers in materials science, physics, and chemistry.
  • This release democratizes access to sophisticated simulation tools for nanoscale analysis.