Dataset Open Access
This dataset allows to investigate phase contrast methods for 4D scanning transmission electron microscopy, such as ptychography.
A synthetic dataset has been simulated, based on an SrTiO3 unit cell as a starting point. Then, a five by five super cell was created by repetition. Two artificial spatial frequencies were added to the phase grating, one with a wavelength of a single unit cell and one with a wavelength of the super cell. To eliminate dynamical scattering, a 4D-STEM simulation with 20 × 20 scan points per unit cell was performed using only one slice with a thickness of one unit cell along electron beam direction .
Data extraction and plot of the phase grating.ipynb
Live processing of momentum-resolved STEM data for first moment imaging and ptychography. Achim Strauch, Dieter Weber, Alexander Clausen, Anastasiia Lesnichaia, Arya Bangun, Benjamin März, Feng Jiao Lyu, Qing Chen, Andreas Rosenauer, Rafal Dunin-Borkowski, Knut Müller-Caspary. arXiv:2106.13457
Weber, Dieter, Lesnichaia, Anastasiia, Strauch, Achim, Clausen, Alexander, Bangun, Arya, Melnyk, Oleh, … Müller-Caspary, Knut. (2021, July 1). Ptychography 4.0: 0.1.0 (Version 0.1.0). Zenodo. http://doi.org/10.5281/zenodo.5055127
Clausen, Alexander, Weber, Dieter, Ruzaeva, Karina, Migunov, Vadim, Baburajan, Anand, Bahuleyan, Abijith, … Dunin-Borkowski, Rafal E. (2021, July 8). LiberTEM/LiberTEM: 0.7.1 (Version 0.7.1). Zenodo. http://doi.org/10.5281/zenodo.5083032