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Theory underpinning multislice simulations with plasmon energy losses

Mendis, BG

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Abstract

The theoretical conditions for small-angle inelastic scattering where the incident electron can effectively be treated as a particle moving in a uniform potential is examined. The motivation for this work is the recent development of a multislice method that combines plasmon energy losses with elastic scattering using Monte Carlo methods. Since plasmon excitation is delocalized, it was assumed that the Bloch wave nature of the incident electron in the crystal does not affect the scattering cross-section. It is shown here that for a delocalized excitation the mixed dynamic form factor term of the scattering cross-section is zero and the scattered intensities follow a Poisson distribution. These features are characteristic of particle-like scattering and validate the use of Monte Carlo methods to model plasmon losses in multislice simulations.

Citation

Mendis, B. (2020). Theory underpinning multislice simulations with plasmon energy losses. Microscopy, 69(3), 173-175. https://doi.org/10.1093/jmicro/dfaa003

Journal Article Type Article
Publication Date Jun 30, 2020
Deposit Date Feb 25, 2020
Publicly Available Date Mar 2, 2021
Journal Microscopy
Print ISSN 2050-5698
Electronic ISSN 2050-5701
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 69
Issue 3
Pages 173-175
DOI https://doi.org/10.1093/jmicro/dfaa003
Public URL https://durham-repository.worktribe.com/output/1275966

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Copyright Statement
This is a pre-copyedited, author-produced PDF of an article accepted for publication in Microscopy following peer review. The version of record Mendis, BG (2020). Theory underpinning multislice simulations with plasmon energy losses. Microscopy 69(3): 173-175 is available online at: https://doi.org/10.1093/jmicro/dfaa003






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