| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Wall, Simon
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Topics
Publications (4/4 displayed)
- 2021Attosecond state-resolved carrier motion in quantum materials probed by soft x-ray XANEScitations
- 2021Attosecond state-resolved carrier motion in quantum materials probed by soft x-ray XANEScitations
- 2016Ultrafast optical response of the amorphous and crystalline states of the phase change material Ge2Sb2Te5citations
- 2013Tracking the evolution of electronic and structural properties of VO 2 during the ultrafast photoinduced insulator-metal transitioncitations
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article
Tracking the evolution of electronic and structural properties of VO 2 during the ultrafast photoinduced insulator-metal transition
Abstract
<p>We present a detailed study of the photoinduced insulator-metal transition in VO<sub>2</sub> with broadband time-resolved reflection spectroscopy. This allows us to separate the response of the lattice vibrations from the electronic dynamics and observe their individual evolution. When we excite VO<sub>2</sub> above the photoinduced phase transition threshold, we find that the restoring forces that describe the ground-state monoclinic structure are lost during the excitation process, suggesting that an ultrafast change in the lattice potential drives the structural transition. However, by performing a series of pump-probe measurements during the nonequilibrium transition, we observe that the electronic properties of the material evolve on a different, slower time scale. This separation of time scales suggests that the early state of VO<sub>2</sub>, immediately after photoexcitation, is a nonequilibrium state that is not well defined by either the insulating or the metallic phase.</p>