0508746 - ÚFP 2020 RIV GB eng J - Článek v odborném periodiku
Tavella, F. - Hoeppner, M. - Tkachenko, V. - Medvedev, Nikita - Capotondi, F. - Golz, T. - Kai, Y. - Manfredda, M. - Pedersoli, E. - Prandolini, M.J. - Stojanovic, N. - Tanikawa, T. - Teubner, U. - Toleikis, S. - Ziaja, B.
Soft x-ray induced femtosecond solid-to-solid phase transition.
High energy density physics. Roč. 24, September (2017), s. 22-27. ISSN 1574-1818. E-ISSN 1878-0563
Institucionální podpora: RVO:61389021
Klíčová slova: free-electron laser * pulse-duration * fel-pulse * diamond * graphitization * diffraction * graphite * coherent * Free electron laser sciences * Material science * Condensed matter physics
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 1.696, rok: 2017 ; AIS: 0.532, rok: 2017
Způsob publikování: Omezený přístup
Web výsledku:
https://www.sciencedirect.com/science/article/abs/pii/S1574181817300617?via%3DihubDOI: https://doi.org/10.1016/j.hedp.2017.06.001

Soft x-rays were applied to induce graphitization of diamond through a non-thermal solid-to-solid phase transition. This process was observed within poly-crystalline diamond with a time-resolved experiment using ultrashort soft x-ray pulses of duration 52.5 fs and cross correlated by an optical pulse of duration 32.8 fs. This scheme enabled for the first time the measurement of a phase transition on a timescale of similar to 150 fs. Excellent agreement between experiment and theoretical predictions was found, using a dedicated code that followed the non-equilibrium evolution of the irradiated diamond including all transient electronic and structural changes. These observations confirm that soft x-rays can induce a non-thermal ultra fast solid-to-solid phase transition on a hundred femtosecond timescale.
Trvalý link: http://hdl.handle.net/11104/0299573