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7 3 I H I G H L I G H T S 2 0 2 3
PRINCIPAL PUBLICATION AND AUTHORS
Ultrafast and persistent photoinduced phase transition at room temperature monitored by streaming powder diffraction, M. Hervé (a,b), G. Privault (a,b), E. Trzop (a,b), S. Akagi (c), Y. Watier (d), S. Zerdane (e), I. Chaban (a,b), R.G. Torres Ramírez (a,b), C. Mariette (a,d), A. Volte (d), M. Cammarata (d), M. Levantino (d), H. Tokoro (c,b), S. Ohkoshi (f,b), E. Collet (a,b,g), Nat. Commun. (2024); https:/doi.org/10.1038/s41467-023-44440-3 (a) Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, Rennes (France) (b) CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, Tokyo (Japan) (c) Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Ibaraki (Japan) (d) ESRF (e) SwissFEL, Paul Scherrer Institut, Villigen (Switzerland) (f) Department of Chemistry, School of Science, The University of Tokyo, Tokyo (Japan) (g) Institut universitaire de France (IUF), Paris (France)
REFERENCES
[1] G. Azzolina et al., Eur. J. Inorg. Chem. 3142-3147 (2019). [2] G. Azzolina et al., J. Mat. Chem. C 9, 6773-6780 (2021).
The newly developed technique therefore unravels that the present PBA material has promising capabilities for ultrafast photo-switching at room temperature and can, in the future, be implemented in novel, optically driven
devices. More globally, it is foreseen that this technique will open new avenues in ultrafast material science by accessing non-reversible dynamics using time-resolved X-ray diffraction.
Fig. 54: a) Time-resolved X-ray diffraction map, showing the transformation of Bragg peaks from tetragonal (Miller indices in blue) to cubic (Miller indices in red) phases. b) Changes in lattice parameters, phase fractions and tetragonal-to-cubic ferroelastic distortion h, obtained from crystallography analysis. c) LT-to-HT conversion rate as a function of incident laser fluence.
