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| 001 | 893900 | ||
| 005 | 20220131124551.0 | ||
| 024 | 7 | _ | |a 10.1016/j.ultramic.2018.12.018 |2 doi |
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| 100 | 1 | _ | |a Müller-Caspary, Knut |0 P:(DE-Juel1)165314 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Comparison of first moment STEM with conventional differential phase contrast and the dependence on electron dose |
| 260 | _ | _ | |a Amsterdam |c 2019 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a This study addresses the comparison of scanning transmission electron microscopy (STEM) measurements of momentum transfers using the first moment approach and the established method that uses segmented annular detectors. Using an ultrafast pixelated detector to acquire four-dimensional, momentum-resolved STEM signals, both the first moment calculation and the calculation of the differential phase contrast (DPC) signals are done for the same experimental data. In particular, we investigate the ability to correct the segment-based signal to yield a suitable approximation of the first moment for cases beyond the weak phase object approximation. It is found that the measurement of momentum transfers using segmented detectors can approach the first moment measurement as close as 0.13 h/nm in terms of a root mean square (rms) difference in 10 nm thick SrTiO3 for a detector with 16 segments. This amounts to 35% of the rms of the momentum transfers. In addition, we present a statistical analysis of the precision of first moment STEM as a function of dose. For typical experimental settings with recent hardware such as a Medipix3 Merlin camera attached to a probe-corrected STEM, we find that the precision of the measurement of momentum transfers stagnates above certain doses. This means that other instabilities such as specimen drift or scan noise have to be taken into account seriously for measurements that target, e.g., the detection of bonding effects in the charge density. |
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| 536 | _ | _ | |a moreSTEM - Momentum-resolved Scanning Transmission Electron Microscopy (VH-NG-1317) |0 G:(DE-HGF)VH-NG-1317 |c VH-NG-1317 |x 1 |
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| 700 | 1 | _ | |a Krause, Florian |0 P:(DE-Juel1)178709 |b 1 |
| 700 | 1 | _ | |a Winkler, Florian |0 P:(DE-Juel1)161387 |b 2 |
| 700 | 1 | _ | |a Béché, Armand |0 0000-0002-8004-4593 |b 3 |
| 700 | 1 | _ | |a Verbeeck, Johan |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Van Aert, Sandra |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Rosenauer, Andreas |0 P:(DE-HGF)0 |b 6 |
| 773 | _ | _ | |a 10.1016/j.ultramic.2018.12.018 |g Vol. 203, p. 95 - 104 |0 PERI:(DE-600)1479043-9 |p 95 - 104 |t Ultramicroscopy |v 203 |y 2019 |x 0304-3991 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/893900/files/160213_2020_02_01.pdf |y Published on 2018-12-30. Available in OpenAccess from 2020-12-30. |
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