Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.245006
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Funding
- French Agence Nationale de la Recherche [ANR-09-BLAN-0206-01]
- Conseil Regional d'Aquitaine [2010-13-04-002, 2.1.3-09010502]
- Agence Nationale de la Recherche (ANR) [ANR-09-BLAN-0206] Funding Source: Agence Nationale de la Recherche (ANR)
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X-ray absorption near-edge spectroscopy (XANES) is a powerful probe of electronic and atomic structures in various media, ranging from molecules to condensed matter. We show how ultrafast time resolution opens new possibilities to investigate highly nonequilibrium states of matter including phase transitions. Based on a tabletop laser-plasma ultrafast x-ray source, we have performed a time-resolved (similar to 3 ps) XANES experiment that reveals the evolution of an aluminum foil at the atomic level, when undergoing ultrafast laser heating and ablation. X-ray absorption spectra highlight an ultrafast transition from the crystalline solid to the disordered liquid followed by a progressive transition of the delocalized valence electronic structure (metal) down to localized atomic orbitals (nonmetal-vapor), as the average distance between atoms increases.
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