Contributors: Principi, E; Giangrisostomi, E; Cucini, R; Bencivenga, F; Battistoni, A; Gessini, A; Mincigrucci, R; Saito, M; Di Fonzo, S; D'Amico, F; DI CICCO, Andrea; Gunnella, Roberto; Filipponi, A; Giglia, A; Nannarone, S; Masciovecchio, C.
نبذة مختصرة : 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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