TY - JOUR
T1 - TopoTEM
T2 - A Python Package for Quantifying and Visualizing Scanning Transmission Electron Microscopy Data of Polar Topologies
AU - O'Connell, Eoghan N.
AU - Moore, Kalani
AU - McFall, Elora
AU - Hennessy, Michael
AU - Moynihan, Eoin
AU - Bangert, Ursel
AU - Conroy, Michele
N1 - Publisher Copyright:
Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of the Microscopy Society of America.
PY - 2022/8/30
Y1 - 2022/8/30
N2 - The exotic internal structure of polar topologies in multiferroic materials offers a rich landscape for materials science research. As the spatial scale of these entities is often subatomic in nature, aberration-corrected transmission electron microscopy (TEM) is the ideal characterization technique. Software to quantify and visualize the slight shifts in atomic placement within unit cells is of paramount importance due to the now routine acquisition of images at such resolution. In the previous ~decade since the commercialization of aberration-corrected TEM, many research groups have written their own code to visualize these polar entities. More recently, open-access Python packages have been developed for the purpose of TEM atomic position quantification. Building on these packages, we introduce the TEMUL Toolkit: a Python package for analysis and visualization of atomic resolution images. Here, we focus specifically on the TopoTEM module of the toolkit where we show an easy to follow, streamlined version of calculating the atomic displacements relative to the surrounding lattice and thus plotting polarization. We hope this toolkit will benefit the rapidly expanding field of topology-based nano-electronic and quantum materials research, and we invite the electron microscopy community to contribute to this open-access project.
AB - The exotic internal structure of polar topologies in multiferroic materials offers a rich landscape for materials science research. As the spatial scale of these entities is often subatomic in nature, aberration-corrected transmission electron microscopy (TEM) is the ideal characterization technique. Software to quantify and visualize the slight shifts in atomic placement within unit cells is of paramount importance due to the now routine acquisition of images at such resolution. In the previous ~decade since the commercialization of aberration-corrected TEM, many research groups have written their own code to visualize these polar entities. More recently, open-access Python packages have been developed for the purpose of TEM atomic position quantification. Building on these packages, we introduce the TEMUL Toolkit: a Python package for analysis and visualization of atomic resolution images. Here, we focus specifically on the TopoTEM module of the toolkit where we show an easy to follow, streamlined version of calculating the atomic displacements relative to the surrounding lattice and thus plotting polarization. We hope this toolkit will benefit the rapidly expanding field of topology-based nano-electronic and quantum materials research, and we invite the electron microscopy community to contribute to this open-access project.
KW - open source
KW - polarization
KW - python
KW - STEM
KW - topology
UR - http://www.scopus.com/inward/record.url?scp=85127851100&partnerID=8YFLogxK
U2 - 10.1017/S1431927622000435
DO - 10.1017/S1431927622000435
M3 - Article
AN - SCOPUS:85127851100
SN - 1431-9276
VL - 28
SP - 1444
EP - 1452
JO - Microscopy and Microanalysis
JF - Microscopy and Microanalysis
IS - 4
ER -