Title
Do you believe that atoms stay in place when you observe them in HREM? Do you believe that atoms stay in place when you observe them in HREM?
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Oxford ,
Subject
Chemistry
Source (journal)
Micron. - Oxford
Volume/pages
68(2015) , p. 158-163
ISSN
0968-4328
ISI
000348016500023
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Recent advancements in aberration-corrected electron microscopy allow for an evaluation of unexpectedly large atom displacements beyond a resolution limit of similar to 0.5 angstrom, which are found to be dose-rate dependent in high resolution images. In this paper we outline a consistent description of the electron scattering process, which explains these unexpected phenomena. Our approach links thermal diffuse scattering to electron beam-induced object excitation and relaxation processes, which strongly contribute to the image formation process. The effect can provide an explanation for the well-known contrast mismatch ("Stobbs factor") between image calculations and experiments. (C) 2014 Elsevier Ltd. All rights reserved.
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