Interplay of thermal and nonthermal effects in x-ray-induced ultrafast melting
X-ray laser-induced structural changes in silicon undergoing femtosecond melting have been investigated by using an x-ray pump--x-ray probe technique. The experiment reveals that the atomic displacements start to increase at $\ensuremath{\sim}20$ fs after the intensity maximum of x-ray pump pulse. By comparing the observed time dependence of the atomic disordering and the dedicated theoretical simulations, we interpret that the energy transfer from the excited electrons to ions via electron-ion coupling (thermal effect) as well as a strong modification of the interatomic potential due to electron excitations (nonthermal effect) trigger the ultrafast atomic disordering. Our results highlight the need to consider the interplay of thermal and nonthermal effects in the quantitative modeling of the interaction of intense x rays with matter.
Authors
- Taito Osaka (ORCID: https://orcid.org/0000-0003-0545-9737)
- S. Toleikis (ORCID: https://orcid.org/0009-0008-2136-7780)
- Hauke Höppner (ORCID: https://orcid.org/0009-0000-1929-5097)
- Yuya Kubota (ORCID: https://orcid.org/0000-0001-9335-098X)
- Hae Ja Lee
- Jumpei Yamada (ORCID: https://orcid.org/0000-0002-5476-4327)
- Vladimir P. Lipp (ORCID: https://orcid.org/0000-0002-5828-2296)
- Victor Tkachenko (ORCID: https://orcid.org/0000-0002-0245-145X)
- Konrad Jerzy Kapcia (ORCID: https://orcid.org/0000-0001-8842-1886)
- Beata Ziaja (ORCID: https://orcid.org/0000-0003-0172-0731)
- Eiji Nishibori (ORCID: https://orcid.org/0000-0002-4192-6577)
- Paloma Martinez (ORCID: https://orcid.org/0000-0003-2624-1809)
- Makina Yabashi (ORCID: https://orcid.org/0000-0002-2472-1684)
- Toru Hara (ORCID: https://orcid.org/0000-0002-4844-161X)
- F. Dorchies (ORCID: https://orcid.org/0000-0002-5922-9585)
- Philip A. Heimann
- Ichiro Inoue
- Yuichi Inubushi
Institutions
- University of Tsukuba (JP)
- Université de Bordeaux (FR)
- Universität Hamburg (DE)
- Helmholtz-Zentrum Dresden-Rossendorf (DE)
- Deutsches Elektronen-Synchrotron DESY (DE)
- SLAC National Accelerator Laboratory (US)
- SPring-8 (JP)
- Institute of Nuclear Physics, Polish Academy of Sciences (PL)
- Japan Synchrotron Radiation Research Institute (JP)
- Spintronics Research Network of Japan (JP)
- Center for Free-Electron Laser Science (DE)
- Centre Émile Durkheim (FR)
- Adam Mickiewicz University in Poznań (PL)
- European X-Ray Free-Electron Laser (DE)
- Polish Academy of Sciences (PL)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2024-09-27
- DOI
- https://doi.org/10.1103/physrevb.110.l100102
- Citations
- 5
- Primary Topic
- X-ray Spectroscopy and Fluorescence Analysis
- Type
- article
- Field-Weighted Citation Impact
- 3.04
Funders
- U.S. Department of Energy
- Narodowa Agencja Wymiany Akademickiej
- Office of Science
- Japan Society for the Promotion of Science
- Fusion Energy Sciences