Functional materials -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0 5 10 15 20 25 a Absorption variation pump-probe delay (ps) 55.98 eV 56.49 eV -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0 5 10 15 20 25 b Absorption variation pump-probe delay (ps) 72.09 eV 73.37 eV E. Paltanin1,2, J.S. Pelli Cresi1, E. Principi1, W. Lee3, F. Bencivenga1, D. De Angelis1,4, L. Foglia1, D. Garzella1, G. Kurdi1, M. Manfredda1, D. Naumenko1,5, A. Simoncig1, S.K. Cushing3, R. Mincigrucci1, C. Masciovecchio1 1 Elettra - Sincrotrone Trieste S.C.p.A., Trieste, Italy 2 Physics Department, University of Trieste, Trieste, Italy 3 Chemistry Department, California Institute of Technology, Pasadena, USA 4 CNR-IOM, TASC Laboratory, Trieste, Italy 5 Infineon Technologies, Villach, Austria e-mail: emiliano.principi@elettra.eu; riccardo.mincigrucci@dynamic-optics.it Acknowledgments E.Pal. has received funding for this project from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 860553. This research was partially supported by the Liquid Sunlight Alliance (the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Fuels from Sunlight Hub, under Award Number DE-SC0021266) (S.K.C.). W.L. acknowledges support by the Korea Foundation for Advanced Studies. The computations presented here were conducted in the Resnick High Performance Computing Center, a facility supported by the Resnick Sustainability Institute at the California Institute of Technology. Original paper E. Paltanin et al., Nat. Commun. 16, 7282 (2025); DOI: 10.1038/s41467-025-62436-z. Fig. 1 Figure 1. Ultrafast absorption dynamics at selected FEL photon energies across the M2,3-edge of iron in hematite (a) and L2,3-edge of aluminium (b) measured on a α-Fe2O3/Al sample. The red points indicate photon energies just below the absorption edge, the blue points are for photon energies just above the absorption edge. "Adapted from E. Paltanin et al., Nat. Commun. 16, 7282 (2025), licensed under CC BY 4.0." Elettra Highlights 2024–2025 39
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