Löffler, S., Sack, S., & Schachinger, T. (2019). Elastic propagation of fast electron vortices through amorphous materials. Acta Crystallographica Section A: Foundations and Advances, 75(6), 902–910. https://doi.org/10.1107/s2053273319012889
E057-02 - Fachbereich Universitäre Serviceeinrichtung für Transmissions- Elektronenmikroskopie E138-03 - Forschungsbereich Functional and Magnetic Materials
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Journal:
Acta Crystallographica Section A: Foundations and Advances
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Date (published):
4-Nov-2019
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Number of Pages:
9
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Publisher:
Wiley-Blackwell Publishing, Inc.
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Peer reviewed:
Yes
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Keywords:
Condensed Matter Physics; General Materials Science; Inorganic Chemistry; Biochemistry; Physical and Theoretical Chemistry; electron vortex beams; Structural Biology; amorphous materials; elastic scattering
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Abstract:
This work studies the elastic scattering behavior of electron vortices when propagating through amorphous samples. A formulation of the multislice approach in cylindrical coordinates is used to theoretically investigate the redistribution of intensity between different angular momentum components due to scattering. To corroborate and elaborate on our theoretical results, extensive numerical simulations are performed on three model systems (Si₃N₄, Fe₀̣ ₈B₀̣ ₂) 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.
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Research Areas:
Quantum Modelling and Simulation: 50% Materials Characterization: 40% Special and Engineering Materials: 10%
