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Lantz, G., Laulhe, C., Ravy, S., Kubli, M., Savoini, M., Tasca, K., Abreu, E., Esposito, V., Porer, M., Ciavardini, A., Cario, L., Rittmann, J., Beaud, P. & Johnson, S. L. (2017) Domain-size effects on the dynamics of a charge density wave in 1T-TaS2. Physical Review B, 96 224101.
Added by: Richard Baschera (2018-02-08 09:03:00) Last edited by: Richard Baschera (2018-02-08 09:07:50) |
| Type de référence: Article DOI: 10.1103/PhysRevB.96.224101 Clé BibTeX: Lantz2017 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, PMN Créateurs: Abreu, Beaud, Cario, Ciavardini, Esposito, Johnson, Kubli, Lantz, Laulhe, Porer, Ravy, Rittmann, Savoini, Tasca Collection: Physical Review B |
Consultations : 1/432
Indice de consultation : 4% Indice de popularité : 1% |
| Résumé |
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Recent experiments have shown that the high-temperature incommensurate (I) charge density wave (CDW) phase of 1T-TaS2 can be photoinduced from the lower-temperature, nearly commensurate CDW state. Here we report a time-resolved x-ray diffraction study of the growth process of the photoinduced I-CDW domains. The layered nature of the material results in a marked anisotropy in the size of the photoinduced domains of the I-phase. These are found to grow self-similarly, their shape remaining unchanged throughout the growth process. The photoinduced dynamics of the newly formed I-CDW phase was probed at various stages of the growth process using a double pump scheme, where a first pump creates I-CDW domains and a second pump excites the newly formed I-CDW state. We observe larger magnitudes of the coherently excited I-CDW amplitude mode in smaller domains, which suggests that the incommensurate lattice distortion is less stable for smaller domain sizes.
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