Femtosecond x-ray diffraction can discern nonthermal from thermal melting

0521098 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Medvedev, Nikita - Kopecký, Miloš - Chalupský, Jaromír - Juha, Libor
Femtosecond x-ray diffraction can discern nonthermal from thermal melting.
Physical Review B. Roč. 99, č. 10 (2019), s. 1-5, č. článku 100303. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA ČR(CZ) GA17-05167s; GA MŠMT LG15013
Institucionální podpora: RVO:68378271
Klíčová slova: femtosecond laser pulse-irradiated semiconductors * discrimination between thermal and nonthermal melting phenomena
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.575, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1103/physrevb.99.100303

Theoretical investigation was performed to reveal which experimental observations enable discrimination between thermal and nonthermal melting in femtosecond laser pulse-irradiated semiconductors. We identify that coherent phonon excitation, visible in the oscillations of various diffraction peaks, provides an opportunity to observe ongoing modifications of interatomic potential. Decoupling the effects of anharmonicity, caused by thermal heating, from the effects of evolution of the interatomic potential, due to electronic excitation, potentially enables differentiation between the two damage channels.
Trvalý link: http://hdl.handle.net/11104/0305761