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Mariette, C., Lorenc, M., Cailleau, H., Collet, E., Guérin, L., Volte, A., Trzop, E., Bertoni, R., Dong, X., Lépine, B., Hernandez, O., Janod, E., Cario, L., Ta Phuoc, V., Ohkoshi, S., Tokoro, H., Patthey, L., Babic, A., Usov, I., Ozerov, D., Sala, L., Ebner, S., Böhler, P., Keller, A., Oggenfuss, A., Zmofing, T., Redford, S., Vetter, S., Follath, R., Juranic, P., Schreiber, A., Beaud, P., Esposito, V., Deng, Y., Ingold, G., Chergui, M., Mancini, G. F., Mankowsky, R., Svetina, C., Zerdane, S., Mozzanica, A., Bosak, A., Wulff, M., Levantino, M., Lemke, H. & Cammarata, M. (2021) Strain wave pathway to semiconductor-to-metal transition revealed by time-resolved X-ray powder diffraction. Nature Communications, 12 1239. 
Added by: Richard Baschera (2021-03-25 10:12:18)
Type de référence: Article
DOI: 10.1038/s41467-021-21316-y
Numéro d'identification (ISBN etc.): 2041-1723
Clé BibTeX: Mariette2021
Voir tous les détails bibliographiques
Catégories: INTERNATIONAL, PMN
Créateurs: Babic, Beaud, Bertoni, Böhler, Bosak, Cailleau, Cammarata, Cario, Chergui, Collet, Deng, Dong, Ebner, Esposito, Follath, Guérin, Hernandez, Ingold, Janod, Juranic, Keller, Lemke, Lépine, Levantino, Lorenc, Mancini, Mankowsky, Mariette, Mozzanica, Oggenfuss, Ohkoshi, Ozerov, Patthey, Redford, Sala, Schreiber, Svetina, Ta Phuoc, Tokoro, Trzop, Usov, Vetter, Volte, Wulff, Zerdane, Zmofing
Collection: Nature Communications
Consultations : 9/66
Indice de consultation : 26%
Indice de popularité : 6.5%
Liens URLs     https://www.nature ... s41467-021-21316-y
Résumé     
One of the main challenges in ultrafast material science is to trigger phase transitions with short pulses of light. Here we show how strain waves, launched by electronic and structural precursor phenomena, determine a coherent macroscopic transformation pathway for the semiconducting-to-metal transition in bistable Ti3O5 nanocrystals. Employing femtosecond powder X-ray diffraction, we measure the lattice deformation in the phase transition as a function of time. We monitor the early intra-cell distortion around the light absorbing metal dimer and the long range deformations governed by acoustic waves propagating from the laser-exposed Ti3O5 surface. We developed a simplified elastic model demonstrating that picosecond switching in nanocrystals happens concomitantly with the propagating acoustic wavefront, several decades faster than thermal processes governed by heat diffusion.
Added by: Richard Baschera  
Notes     
Number: 1 Publisher: Nature Publishing Group
Added by: Richard Baschera  
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