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Femtosecond phase-transition in hard x-ray excited bismuth
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SYSNO ASEP 0505015 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Femtosecond phase-transition in hard x-ray excited bismuth Tvůrce(i) Makita, M. (CH)
Vartiainen, I. (CH)
Mohacsi, I. (CH)
Caleman, C. (DE)
Diaz, A. (CH)
Jonsson, H.O. (SE)
Juranic, P. (CH)
Medvedev, Nikita (FZU-D) ORCID, RID
Meents, A. (DE)
Mozzanica, A. (CH)
Opara, N.L. (CH)
Padeste, C. (CH)
Panneels, V. (CH)
Saxena, V. (DE)
Sikorski, M. (US)
Song, S. (US)
Vera, L. (CH)
Willmott, P. R. (CH)
Beaud, P. (CH)
Milne, C. J. (CH)
Ziaja-Motyka, B. (DE)
David, C. (CH)Celkový počet autorů 22 Číslo článku 602 Zdroj.dok. Scientific Reports. - : Nature Publishing Group - ISSN 2045-2322
Roč. 9, Jan (2019), s. 1-7Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova hard x-ray excitation in bismuth single crystal ; femtsosecond phase-transition ; electron-ion equilibration process Vědní obor RIV BH - Optika, masery a lasery Obor OECD Optics (including laser optics and quantum optics) Způsob publikování Open access Institucionální podpora FZU-D - RVO:68378271 UT WOS 000456554600041 EID SCOPUS 85060536626 DOI 10.1038/s41598-018-36216-3 Anotace The evolution of bismuth crystal structure upon excitation of its A1g phonon has been intensely studied with short pulse optical lasers. Here we present the first-time observation of a hard x-ray induced ultrafast phase transition in a bismuth single crystal at high intensities (~1014 W/cm2). The lattice evolution was followed using a recently demonstrated x-ray single-shot probing setup. The time evolution of the (111) Bragg peak intensity showed strong dependence on the excitation fluence. After exposure to a sufficiently intense x-ray pulse, the peak intensity dropped to zero within 300 fs, i.e. faster than one oscillation period of the A1g mode at room temperature. Our analysis indicates a nonthermal origin of a lattice disordering process, and excludes interpretations based on electron-ion equilibration process, or on thermodynamic heating process leading to plasma formation. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2020 Elektronická adresa http://hdl.handle.net/11104/0296542
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