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Article Dans Une Revue Nature Physics Année : 2024

All-optical seeding of a light-induced phase transition with correlated disorder

Résumé

Ultrafast manipulation of vibrational coherence provides a route to control the structure of solids. However, this strategy can only induce long-range correlations and cannot modify atomic structure locally, which is a requirement for many technological applications such as non-volatile electronics. Here we demonstrate that ultrafast lasers can generate incoherent structural fluctuations that are more efficient for material control than coherent vibrations, extending optical control to a wide range of materials. We observe that local non-equilibrium lattice distortions generated by a weak laser pulse reduce the energy barrier to switch between insulating and metallic states in vanadium dioxide. Seeding inhomogeneous structural fluctuations presents an alternative, more energy-efficient, route for controlling materials that may be applicable to all solids, including those used in data- and energy-storage devices. Controlling phase transitions in solids is crucial for many applications. Ultrafast laser pulses have now been shown to enable the energy-efficient generation of structural fluctuations in VO2 by harnessing the correlated disorder in the material.
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vendredi 11 octobre 2024
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Année Mois Jours
Avant la publication
vendredi 11 octobre 2024
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vendredi 11 octobre 2024
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Dates et versions

hal-04615409 , version 1 (01-07-2024)

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Allan S. Johnson, Ernest Pastor, Sergi Batlle-Porro, Hind Benzidi, Tetsuo Katayama, et al.. All-optical seeding of a light-induced phase transition with correlated disorder. Nature Physics, 2024, 20, pp.970-975. ⟨10.1038/s41567-024-02474-4⟩. ⟨hal-04615409⟩
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