Simulating strain dynamics in ultrafast x-ray scattering

P. Kollenz; D. D. M. Galindo; M. Heindl; V. Kunzelmann; V. Streibel; P. Zalden; T. Zewdie; I. D. Sharp; F. Deschler

doi:10.1117/12.3017059

6 June 2024 Simulating strain dynamics in ultrafast x-ray scattering

P. Kollenz, D. D. M. Galindo, M. Heindl, V. Kunzelmann, V. Streibel, P. Zalden, T. Zewdie, I. D. Sharp, F. Deschler

Proceedings Volume PC12992, Advances in Ultrafast Condensed Phase Physics IV; PC129920Z (2024) https://doi.org/10.1117/12.3017059
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

The formation of local strain fields is a key aspect in understanding light-induced processes in semiconductors: For instance, electric conductivity is influenced by the formation of polarons, quasiparticles that evolve from the interaction of a charge carrier with the lattice. We performed pump-probe experiments with an X-ray Free-Electron Laser (XFEL) to measure the photoinduced X-ray scattering dynamics of epitaxial BiVO4 with femtosecond time resolution. We then compared this data to simulations of different localized strain fields in a regular quadratic lattice. While the material shows little diffuse scattering, comparison with simulations of an acoustic strain wave indicates that the material is contracting in a concerted motion.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

P. Kollenz, D. D. M. Galindo, M. Heindl, V. Kunzelmann, V. Streibel, P. Zalden, T. Zewdie, I. D. Sharp, and F. Deschler "Simulating strain dynamics in ultrafast x-ray scattering", Proc. SPIE PC12992, Advances in Ultrafast Condensed Phase Physics IV, PC129920Z (6 June 2024); https://doi.org/10.1117/12.3017059

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