TY  - JOUR
AU  - Winkler, Florian
AU  - Barthel, Juri
AU  - Dunin-Borkowski, Rafal E.
AU  - Müller-Caspary, Knut
TI  - Direct measurement of electrostatic potentials at the atomic scale: A conceptual comparison between electron holography and scanning transmission electron microscopy
JO  - Ultramicroscopy
VL  - 210
SN  - 0304-3991
CY  - Amsterdam
PB  - Elsevier Science
M1  - FZJ-2020-02030
SP  - 112926
PY  - 2020
AB  - Off-axis electron holography and first moment STEM are sensitive to electromagnetic potentials or fields, respectively. In this work, we investigate in what sense the results obtained from both techniques are equivalent and work out the major differences. The analysis is focused on electrostatic (Coulomb) potentials at atomic spatial resolution. It is shown that the probe-forming/objective aperture strongly affects the reconstructed electrostatic potentials and that, as a result of the different illumination setups, dynamical diffraction effects show a specific response with increasing specimen thickness. It is shown that thermal diffuse scattering is negligible for a wide range of specimen thicknesses, when evaluating the first moment of diffraction patterns.
LB  - PUB:(DE-HGF)16
C6  - pmid:31955112
UR  - <Go to ISI:>//WOS:000522150200004
DO  - DOI:10.1016/j.ultramic.2019.112926
UR  - https://juser.fz-juelich.de/record/875435
ER  -