TY  - JOUR
AU  - Inoue, Ichiro
AU  - Tkachenko, Victor
AU  - Kubota, Yuya
AU  - Dorchies, Fabien
AU  - Hara, Toru
AU  - Höppner, Hauke
AU  - Inubushi, Yuichi
AU  - Kapcia, Konrad J.
AU  - Lee, Hae Ja
AU  - Lipp, Vladimir
AU  - Martinez, Paloma
AU  - Nishibori, Eiji
AU  - Osaka, Taito
AU  - Toleikis, Sven
AU  - Yamada, Jumpei
AU  - Yabashi, Makina
AU  - Ziaja, Beata
AU  - Heimann, Philip A.
TI  - Interplay of thermal and nonthermal effects in x-ray-induced ultrafast melting
JO  - Physical review / B
VL  - 110
IS  - 10
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - PUBDB-2024-06125
SP  - L100102
PY  - 2024
AB  - 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 ∼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. 
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001327170000006
DO  - DOI:10.1103/PhysRevB.110.L100102
UR  - https://bib-pubdb1.desy.de/record/615370
ER  -