Theory underpinning multislice simulations with plasmon energy losses

Mendis, BG

doi:10.1093/jmicro/dfaa003

Theory underpinning multislice simulations with plasmon energy losses

Mendis, BG

Authors

Dr Buddhika Mendis b.g.mendis@durham.ac.uk
Associate Professor

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

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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