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@ARTICLE{MllerCaspary:850195,
author = {Müller-Caspary, Knut and Oppermann, Oliver and Grieb, Tim
and Krause, Florian F. and Rosenauer, Andreas and Marco},
title = {{M}aterials characterisation by angle-resolved scanning
transmission electron microscopy},
journal = {Scientific reports},
volume = {6},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2018-04269},
pages = {37146},
year = {2016},
abstract = {Solid-state properties such as strain or chemical
composition often leave characteristic fingerprints in the
angular dependence of electron scattering. Scanning
transmission electron microscopy (STEM) is dedicated to
probe scattered intensity with atomic resolution, but it
drastically lacks angular resolution. Here we report both a
setup to exploit the explicit angular dependence of
scattered intensity and applications of angle-resolved STEM
to semiconductor nanostructures. Our method is applied to
measure nitrogen content and specimen thickness in a
GaNxAs1−x layer independently at atomic resolution by
evaluating two dedicated angular intervals. We demonstrate
contrast formation due to strain and composition in a Si-
based metal-oxide semiconductor field effect transistor
(MOSFET) with GexSi1−x stressors as a function of the
angles used for imaging. To shed light on the validity of
current theoretical approaches this data is compared with
theory, namely the Rutherford approach and contemporary
multislice simulations. Inconsistency is found for the
Rutherford model in the whole angular range of
16–255 mrad. Contrary, the multislice simulations are
applicable for angles larger than 35 mrad whereas a
significant mismatch is observed at lower angles. This
limitation of established simulations is discussed
particularly on the basis of inelastic scattering.},
cin = {ER-C-1},
ddc = {000},
cid = {I:(DE-Juel1)ER-C-1-20170209},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:27849001},
UT = {WOS:000388081000001},
doi = {10.1038/srep37146},
url = {https://juser.fz-juelich.de/record/850195},
}