Topological analysis of paraxially scattered electron vortex beams

Abstract

We investigate topological aspects of sub-nm electron vortex beams upon elastic propagation through atomic scattering potentials. Two main aspects can be distinguished: (i) Significantly reduced delocalization compared to a similar non-vortex beam if the beam centers on an atomic column and (ii) site symmetry dependent splitting of higher-order vortex beams. Furthermore, the results provide insight into the complex vortex line fabric within the elastically scattered wave containing characteristic vortex loops predominantly attached to atomic columns and characteristic twists of vortex lines around atomic columns.

10 pages, 6 figures

References in corpus (4)

• Semiclassical Dynamics of Electron Wave Packet States with Phase Vortices
• Electron vortex beams in a magnetic field: A new twist on Landau levels and Aharonov-Bohm states
• Atomic scale electron vortices for nanoresearch
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