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Nonthermal acceleration of atoms as a mechanism of fast lattice heating in ion tracks
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SYSNO ASEP 0559832 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nonthermal acceleration of atoms as a mechanism of fast lattice heating in ion tracks Author(s) Medvedev, Nikita (FZU-D) ORCID, RID
Volkov, A.E. (RU)Number of authors 2 Article number 225903 Source Title Journal of Applied Physics. - : AIP Publishing - ISSN 0021-8979
Roč. 131, č. 22 (2022)Number of pages 7 s. Language eng - English Country US - United States Keywords nonthermal acceleration of atoms ; fast lattice heating ; electronic cooling ; femtosecond laser pulses ; electron-phonon coupling Subject RIV BH - Optics, Masers, Lasers OECD category Fluids and plasma physics (including surface physics) R&D Projects LTT17015 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018114 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_027/0008215 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure e-INFRA CZ - 90140 - CESNET, zájmové sdružení právnických osob Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000812347900010 EID SCOPUS 85132172455 DOI 10.1063/5.0095724 Annotation Atomic heating in a solid takes place after an impact of a swift heavy ion within a time of electronic cooling there, i.e., similar to 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. Published under an exclusive license by AIP Publishing. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address https://doi.org/10.1063/5.0095724
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