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arXiv · 2506.21004

Quantitative structure determination from experimental four-dimensional scanning transmission electron microscopy via the scattering matrix

Emmanuel W. C. Terzoudis-Lumsden·Alireza Sadri·Matthew Weyland·Laure Bourgeois·Stephanie M. Ribet·Georgios Varnavides·Colin Ophus·Timothy C. Petersen·Scott D. Findlay
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Abstract

Considerable inroads have recently been made on algorithms to determine the sample potential from four-dimensional scanning transmission electron microscopy data from thick samples where multiple scattering cannot be neglected. This paper further develops the scattering matrix approach to such structure determination. Through simulation, we demonstrate how this approach can be modified to better handle partial spatial coherence, unknown probe defocus, and information from the dark field region. By combining these developments we reconstruct the electrostatic potential of a monolithic SrTiO$_3$ crystal showing good quantitative agreement with the expected structure.

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Emmanuel W. C. Terzoudis-Lumsden, Alireza Sadri, Matthew Weyland, Laure Bourgeois, Stephanie M. Ribet, Georgios Varnavides, Colin Ophus, Timothy C. Petersen, Scott D. Findlay. 2025-06-26. Quantitative structure determination from experimental four-dimensional scanning transmission electron microscopy via the scattering matrix. https://arxiv.org/abs/2506.21004

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