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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Allen, Leslie
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2010Elemental mapping in scanning transmission electron microscopycitations
- 2009Quantitative comparisons of contrast in experimental and simulated bright-field scanning transmission electron microscopy imagescitations
- 2009Theory of dynamical scattering in near-edge electron energy loss spectroscopycitations
- 2008Depth sectioning using electron energy loss spectroscopycitations
- 2008Three-dimensional imaging in double aberration-corrected scanning confocal electron microscopy, Part II: Inelastic scatteringcitations
- 2008Volcano structure in atomic resolution core-loss imagescitations
- 2007Interpreting atomic-resolution spectroscopic imagescitations
- 2007Imaging using inelastically scattered electrons in CTEM and STEM geometrycitations
- 2007Depth sectioning in scanning transmission electron microscopy based on core-loss spectroscopycitations
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article
Volcano structure in atomic resolution core-loss images
Abstract
A feature commonly present in simulations of atomic resolution electron energy loss spectroscopy images in the scanning transmission electron microscope is the volcano or donut structure. In the past this has been understood in terms of a geometrical perspective using a dipole approximation. It is shown that the dipole approximation for core-loss spectroscopy begins to break down as the probe forming aperture semi-angle increases, necessitating the inclusion of higher order terms for a quantitative understanding of volcano formation. Using such simulations we further investigate the mechanisms behind the formation of such structures in the single atom case and extend this to the case of crystals. The cubic SrTiO3 crystal is used as a test case to show the effects of nonlocality, probe channelling and absorption in producing the volcano structure in crystal images.