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. 2021 Feb 12;126(6):065001.
doi: 10.1103/PhysRevLett.126.065001.

Ultrafast Thermal Melting in Nonequilibrium Warm Dense Copper

N Jourdain  1   2 , L Lecherbourg  2   3 , V Recoules  2 , P Renaudin  2 , F Dorchies  1
Affiliations

Ultrafast Thermal Melting in Nonequilibrium Warm Dense Copper

N Jourdain et al. Phys Rev Lett. .

Abstract

The ultrafast dynamics of the loss of crystalline periodicity is investigated in femtosecond laser heated warm dense copper, by the original use of x-ray absorption near-edge specific structures just above the L3 edge. The characteristic time is observed near 1 ps, for specific energy density ranging from 1 to 5 MJ/kg, using ps-resolution x-ray absorption spectroscopy. The overall experimental data are well reproduced with two-temperature hydrodynamic simulations, supporting a thermal phase transition.

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