# Elastic propagation of fast electron vortices through amorphous materials

## TL;DR

This paper investigates how electron vortices scatter elastically in amorphous materials using a theoretical multislice approach and extensive simulations, providing insights to improve vortex creation and applications.

## Contribution

It introduces a multislice cylindrical coordinate formulation for electron vortex scattering and validates it with simulations across various materials and parameters.

## Key findings

- Quantified the purity of electron vortices after scattering
- Analyzed angular momentum transfer during elastic scattering
- Assessed variability due to atomic position randomness

## Abstract

In this work, we study the elastic scattering behavior of electron vortices when propagating through amorphous samples. We use a formulation of the multislice approach in cylindrical coordinates to theoretically investigate the redistribution of intensity between different angular momentum components due to scattering. To corroborate and elaborate on our theoretical results, we perform extensive numerical simulations on three model systems (Si$_3$N$_4$, Fe$_{0.8}$B$_{0.2}$, Pt) for a wide variety of experimental parameters to quantify the purity of the vortices, the net angular momentum transfer, and the variability of the results with respect to the random relative position between the electron beam and the scattering atoms. These results will help scientists to further improve the creation of electron vortices and enhance applications involving them.