Picosecond Short-Range Disordering in Isochorically Heated Aluminum at Solid Density

Mancic, A.; Lévy, Anna; Harmand, M.; Nakatsutsumi, M.; Antici, P.; Audebert, P.; Combis, P.; Fourmaux, S.; Mazevet, S.; Peyrusse, O.; Recoules, V.; Renaudin, P.; Robiche, J.; Dorchies, F.; Fuchs, Julien

doi:10.1103/physrevlett.104.035002

Cited by 81 publications

(35 citation statements)

References 32 publications

(30 reference statements)

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“…We can observe a spectrum at standard conditions ( ¼ 0 and T ¼ 0:025 eV) with typical XANES structures and a spectrum at % 0 and T % 0:3 eV with a smoothing of these structures due to the loss of ion-ion order. This result is consistent with results previously obtained by isochoric heating [14]. Concerning the other spectra, corresponding to reshock conditions, we also observe strong perturbations of the K edge as the density and temperature increase.…”

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confidence: 92%

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Electronic Structure Investigation of Highly Compressed Aluminum withKEdge Absorption Spectroscopy

et al. 2011

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The electronic structure evolution of highly compressed aluminum has been investigated using time resolved K edge x-ray absorption spectroscopy. A long laser pulse (500 ps, I(L)≈8×10(13) W/cm(2)) was used to create a uniform shock. A second ps pulse (I(L)≈10(17) W/cm(2)) generated an ultrashort broadband x-ray source near the Al K edge. The main target was designed to probe aluminum at reshocked conditions up to now unexplored (3 times the solid density and temperatures around 8 eV). The hydrodynamical conditions were obtained using rear side visible diagnostics. Data were compared to ab initio and dense plasma calculations, indicating potential improvements in either description. This comparison shows that x-ray-absorption near-edge structure measurements provide a unique capability to probe matter at these extreme conditions and severally constrains theoretical approaches currently used.

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confidence: 92%

“…Indeed, it is already widely used in various fields ranging from solid-state physics to chemistry or molecular biology. Only recently it has been applied to the WDM created by laser isochoric proton heating [14], providing direct insights into the dynamic of the solid-to-plasma phase transition around solid density.…”

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confidence: 99%

Electronic Structure Investigation of Highly Compressed Aluminum withKEdge Absorption Spectroscopy

et al. 2011

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“…2(d)), data are particularly scattered, however one can discern a twofold trend: a tangible attenuation of absorption at intermediate fluences followed by an increase above 1 J cm −2 . These findings are in good qualitative agreement with pioneering time resolved x-ray absorption spectroscopy (XAS) measurements carried out on laser-heated metals (Cu L 3 -edge, 18 Al K-edge, 19 and Ni L 3 -edge 20 ). In those experiments, a smearing of the absorption edge was noticed, as indicated by the red arrows in Fig.…”

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confidence: 88%

Free electron laser-driven ultrafast rearrangement of the electronic structure in Ti

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Giangrisostomi

Cucini

et al. 2015

Structural Dynamics

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High-energy density extreme ultraviolet radiation delivered by the FERMI seeded free-electron laser has been used to create an exotic nonequilibrium state of matter in a titanium sample characterized by a highly excited electron subsystem at temperatures in excess of 10 eV and a cold solid-density ion lattice. The obtained transient state has been investigated through ultrafast absorption spectroscopy across the Ti M2,3-edge revealing a drastic rearrangement of the sample electronic structure around the Fermi level occurring on a time scale of about 100 fs.

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“…At highest densities and temperatures, the spectrum is typical of a warm dense aluminum plasma, in agreement with previous results reported by using proton heating. The disappearance of any characteristic structures in the spectrum is related to the loss of short range order at such temperatures [20,21]. As both the temperature and density decrease, we first see a steepening of the edge and, for the lowest density-temperature conditions, the continuous formation of a sharp preedge.…”

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confidence: 82%

X-Ray Diagnosis of the Pressure Induced Mott Nonmetal-Metal Transition

et al. 2012

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The evolution of the K-edge x-ray absorption near-edge spectroscopy (XANES) spectrum is investigated for an aluminum plasma expanding from the solid density down to 0.5 g/cm{3}, with temperatures lying from 5 down to 2 eV. The dense plasma is generated by nanosecond laser-induced shock compression. These conditions correspond to the density-temperature region where a metal-nonmetal transition occurs as the density decreases. This transition is directly observed in XANES spectra measurements through the progressive formation of a preedge structure for densities around 1.6 g/cm{3}. Ab initio calculations based on density functional theory and a jellium model have been efficiently tested through direct comparison with the experimental measurements and show that this preedge corresponds to the relocalization of the 3p atomic orbital as the system evolves from a dense plasma toward a partially ionized atomic fluid.

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Picosecond Short-Range Disordering in Isochorically Heated Aluminum at Solid Density

Cited by 81 publications

References 32 publications

Electronic Structure Investigation of Highly Compressed Aluminum withKEdge Absorption Spectroscopy

Electronic Structure Investigation of Highly Compressed Aluminum withKEdge Absorption Spectroscopy

Free electron laser-driven ultrafast rearrangement of the electronic structure in Ti

X-Ray Diagnosis of the Pressure Induced Mott Nonmetal-Metal Transition

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