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Comparison of azimuthal plots for reflection high‐energy positron diffraction (RHEPD) and reflection high‐energy electron diffraction (RHEED) for Si(111) surface

Comparison of azimuthal plots for reflection high‐energy positron diffraction (RHEPD) and... Azimuthal plots for RHEPD (reflection high‐energy positron diffraction) and RHEED (reflection high‐energy electron diffraction) were calculated using dynamical diffraction theory and then compared. It was assumed that RHEPD and RHEED azimuthal plots can be collected practically by recording the intensity while rotating the sample around the axis perpendicular to the surface (for the case of X‐ray diffraction, such forms of data are called Renninger scans). It was found that RHEPD plots were similar to RHEED plots if they were compared at Bragg reflections of the same order. RHEPD plots can also be determined in the region of total external reflection and for such conditions multiple scattering effects turned out to be very weak. The findings for azimuthal plots are also discussed in the context of the formation mechanisms of Kikuchi patterns. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section A Foundations of Crystallography Wiley

Comparison of azimuthal plots for reflection high‐energy positron diffraction (RHEPD) and reflection high‐energy electron diffraction (RHEED) for Si(111) surface

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References (39)

Publisher
Wiley
Copyright
Copyright © 2020 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0108-7673
eISSN
1600-5724
DOI
10.1107/S2053273320001205
Publisher site
See Article on Publisher Site

Abstract

Azimuthal plots for RHEPD (reflection high‐energy positron diffraction) and RHEED (reflection high‐energy electron diffraction) were calculated using dynamical diffraction theory and then compared. It was assumed that RHEPD and RHEED azimuthal plots can be collected practically by recording the intensity while rotating the sample around the axis perpendicular to the surface (for the case of X‐ray diffraction, such forms of data are called Renninger scans). It was found that RHEPD plots were similar to RHEED plots if they were compared at Bragg reflections of the same order. RHEPD plots can also be determined in the region of total external reflection and for such conditions multiple scattering effects turned out to be very weak. The findings for azimuthal plots are also discussed in the context of the formation mechanisms of Kikuchi patterns.

Journal

Acta Crystallographica Section A Foundations of CrystallographyWiley

Published: May 1, 2020

Keywords: ; ; ;

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