Non-thermal structural transformation of diamond driven by x-rays

0584066 - ÚFP 2024 RIV US eng J - Článek v odborném periodiku
Heimann, P. - Hartley, N. J. - Inoue, I. - Tkachenko, V. - Antoine, A. - Dorchies, F. - Falcone, R. - Gaudin, J. - Höppner, H. - Inubushi, Y. - Kapcia, K. J. - Lee, H. J. - Lipp, V. - Martinez, P. - Medvedev, Nikita - Tavella, F. - Toleikis, S. - Yabashi, M. - Yabuuchi, T. - Yamada, J. - Ziaja, B.
Non-thermal structural transformation of diamond driven by x-rays.
Structural Dynamics. Roč. 10, č. 5 (2023), č. článku 054502. E-ISSN 2329-7778
Institucionální podpora: RVO:61389021
Klíčová slova: X-rays * diamond * SACLA XFEL
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.8, rok: 2022
Způsob publikování: Open access
https://pubs.aip.org/aca/sdy/article/10/5/054502/2918950/Non-thermal-structural-transformation-of-diamond

Intense x-ray pulses can cause the non-thermal structural transformation of diamond. At the SACLA XFEL facility, pump x-ray pulses triggered this phase transition, and probe x-ray pulses produced diffraction patterns. Time delays were observed from 0 to 250 fs, and the x-ray dose varied from 0.9 to 8.0 eV/atom. The intensity of the (111), (220), and (311) diffraction peaks decreased with time, indicating a disordering of the crystal lattice. From a Debye-Waller analysis, the rms atomic displacements perpendicular to the (111) planes were observed to be significantly larger than those perpendicular to the (220) or (311) planes. At a long time delay of 33 ms, graphite (002) diffraction indicates that graphitization did occur above a threshold dose of 1.2 eV/atom. These experimental results are in qualitative agreement with XTANT+ simulations using a hybrid model based on density-functional tight-binding molecular dynamics.
Trvalý link: https://hdl.handle.net/11104/0352073