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arXiv · 2407.08146

Extending the Takagi-Taupin equations for x-ray nanobeam Bragg coherent diffraction

T. Zhou·M. J. Cherukara·S. Kandel·M. Allain·N. Hua·O. Shpyrko·Y. Takamura·Z. Cai·S. O. Hruszkewycz·M. V. Holt
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Abstract

We present a new approach for simulating x-ray nanobeam Bragg coherent diffraction patterns based on the Takagi-Taupin equations. Compared to conventional methods, the current approach can be universally applied to any weakly strained system including semi-infinite crystals that diffract dynamically. It addresses issues such as the curved wavefront and re-divergence of the focused incident beam. We show excellent agreement against experimental data on a strained La0.7Sr0.3MnO3 thin film on SrTiO3 substrate, and a path to extracting physical information using automatic differentiation.

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T. Zhou, M. J. Cherukara, S. Kandel, M. Allain, N. Hua, O. Shpyrko, Y. Takamura, Z. Cai, S. O. Hruszkewycz, M. V. Holt. 2024-07-11. Extending the Takagi-Taupin equations for x-ray nanobeam Bragg coherent diffraction. https://arxiv.org/abs/2407.08146

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