Orbital-angular-momentum-resolved electron magnetic chiral dichroism

TL;DR

This paper introduces a new, efficient method for atomically-resolved electron magnetic chiral dichroism using an orbital angular momentum spectrometer, offering simpler experimental conditions and improved signal-to-noise ratio.

Contribution

The paper presents a novel approach combining orbital angular momentum analysis with electron magnetic chiral dichroism, enhancing resolution and experimental simplicity.

Findings

Increased magnetic signal to noise ratio demonstrated.

Method allows for simultaneous energy and angular momentum dispersion.

Simplifies experimental setup compared to previous techniques.

Abstract

We propose a highly efficient atomically-resolved mode of electron magnetic chiral dichroism. This method exploits the recently introduced orbital angular momentum spectrometer to analyze the inelastically scattered electrons allowing for simultaneous dispersion in both energy and angular momentum. The technique offers several advantages over previous formulations of electron magnetic chiral dichroism as it requires much simpler experimental conditions in terms of specimen orientation and thickness. A novel simulation algorithm, based on the multislice description of the beam propagation, is used to anticipate the advantages of the new approach over current electron magnetic chiral dichroism implementations. Numerical calculations confirm an increased magnetic signal to noise ratio with in plane atomic resolution.