Reflection high-energy electron diffraction: Difference between revisions

Revision as of 16:40, 23 May 2020

Revision as of 02:34, 29 June 2020

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[[File:TiO2 Good Surface.gif|thumbnail|400px|'''Figure 2'''. A RHEED pattern obtained from electron diffraction from a clean TiO2 (110) surface. The bright spots indicate where many electrons reach the detector. The lines that can be observed are Kikuchi Lines.]]

[[File:KSA 400 RHEED Oscillation.webm|thumb|400px|'''Video 1'''. RHEED oscillation video using kSA 400 analytical RHEED system]]

Two types of diffraction contribute to RHEED patterns. Some incident electrons undergo a single, [[elastic scattering]] event at the crystal surface, a process termed kinematic scattering.<ref name="ichimiya2004"/> [[Dynamical theory of diffraction|Dynamic scattering]] occurs when electrons undergo multiple diffraction events in the crystal and lose some of their energy due to interactions with the sample.<ref name="ichimiya2004"/> Users extract non-qualitative data from the kinematically diffracted electrons. These electrons account for the high intensity spots or rings common to RHEED patterns. RHEED users also analyze dynamically scattered electrons with complex techniques and models to gather quantitative information from RHEED patterns.<ref name="braun1999"/>