Nonthermal acceleration of atoms as a mechanism of fast lattice heating in ion tracks

0579466 - ÚFP 2024 RIV US eng J - Článek v odborném periodiku
Medvedev, Nikita - Volkov, A.E.
Nonthermal acceleration of atoms as a mechanism of fast lattice heating in ion tracks.
Journal of Applied Physics. Roč. 131, č. 22 (2022), č. článku 225903. ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA MŠMT LTT17015; GA MŠMT(CZ) LM2018114; GA MŠMT EF16_013/0001552
Grant ostatní: Ministerstvo školství, mládeže a tělovýchovy - GA MŠk(CZ) LM2018140; European Cooperation in Science and Technology(BE) CA17126
Program: COST
Institucionální podpora: RVO:61389021
Klíčová slova: ion * atomic heating * electronic cooling
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 3.2, rok: 2022
Způsob publikování: Omezený přístup
https://pubs.aip.org/aip/jap/article-abstract/131/22/225903/2837220/Nonthermal-acceleration-of-atoms-as-a-mechanism-of?redirectedFrom=fulltext

Atomic heating in a solid takes place after an impact of a swift heavy ion within a time of electronic cooling there, i.e., ∼100 fs. This implies an extremely fast electron-ion energy exchange (electron-phonon coupling) necessary for the production of detected ion tracks. In contrast, laser irradiation experiments and calculations show too slow electron-phonon energy exchange to cause structural changes detected in swift heavy ion tracks in solids. We demonstrate that this contradiction can be resolved by taking into account that electron-phonon coupling is not the sole mechanism of energy exchange between electrons and ions in condensed matter. Excitation of the electronic system alters the potential energy surface of atoms, causing them to accelerate and increase their kinetic energy at ultrashort times.
Trvalý link: https://hdl.handle.net/11104/0348303