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Laulhe, C., Huber, T., Lantz, G., Ferrer, A., Mariager, S. O., Grubel, S., Rittmann, J., Johnson, J. A., Esposito, V., Lubcke, A., Huber, L., Kubli, M., Savoini, M., Jacques, V. L. R., Cario, L., Corraze, B., Janod, E., Ingold, G., Beaud, P., Johnson, S. L. & Ravy, S. (2017) Ultrafast Formation of a Charge Density Wave State in 1T-TaS2: Observation at Nanometer Scales Using Time-Resolved X-Ray Diffraction. Physical Review Letters, 118 247401.
Added by: Richard Baschera (2017-07-10 13:32:18) Last edited by: Richard Baschera (2017-07-10 13:36:04) |
| Type de référence: Article DOI: 10.1103/PhysRevLett.118.247401 Numéro d'identification (ISBN etc.): 0031-9007 Clé BibTeX: Laulhe2017 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, PMN Créateurs: Beaud, Cario, Corraze, Esposito, Ferrer, Grubel, Huber, Huber, Ingold, Jacques, Janod, Johnson, Johnson, Kubli, Lantz, Laulhe, Lubcke, Mariager, Ravy, Rittmann, Savoini Collection: Physical Review Letters |
Consultations : 1/459
Indice de consultation : 4% Indice de popularité : 1% |
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Femtosecond time-resolved x-ray diffraction is used to study a photoinduced phase transition between two charge density wave (CDW) states in 1T-TaS2, namely the nearly commensurate (NC) and the incommensurate (I) CDW states. Structural modulations associated with the NC-CDW order are found to disappear within 400 fs. The photoinduced I-CDW phase then develops through a nucleation and growth process which ends 100 ps after laser excitation. We demonstrate that the newly formed I-CDW phase is fragmented into several nanometric domains that are growing through a coarsening process. The coarsening dynamics is found to follow the universal Lifshitz-Allen-Cahn growth law, which describes the ordering kinetics in systems exhibiting a nonconservative order parameter.
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