Matches in SemOpenAlex for { <https://semopenalex.org/work/W3198681682> ?p ?o ?g. }
- W3198681682 abstract "We investigate the ultrafast lattice dynamics in ${mathrm{BaFe}}_{2}{mathrm{As}}_{2}$ via time-resolved x-ray diffraction measurements using an x-ray free-electron laser at SPring-8 Angstrom Compact free-electron LAser (SACLA). The profile of the Bragg peaks substantially changes after strong photoexcitation, where the $c$ axis length of the lattice initially contracts, followed by expansion. These ultrafast lattice contractions and expansions significantly depend on the pump fluence, and it is suggested that a strong normal stress is applied along the $c$ axis. To obtain a phenomenological understanding of the observed lattice dynamics, we performed calculations based on a two-temperature model and an ultrafast thermoelasticity model. Our results showed that a steep gradient of the electron temperature induced by photoexcitation generates a blast force, which acts as a strong normal stress. We propose that a temporal stress can be applied by a strong optical pump, and this scheme can be another route for the application of uniaxial stress to superconductors." @default.
- W3198681682 created "2021-09-13" @default.
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- W3198681682 date "2021-09-08" @default.
- W3198681682 modified "2023-10-16" @default.
- W3198681682 title "Ultrafast optical stress on BaFe2As2" @default.
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