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- W2025192776 endingPage "1773" @default.
- W2025192776 startingPage "1771" @default.
- W2025192776 abstract "Reversible structural changes of a nanostructure were measured nondestructively with subpicometer spatial and subpicosecond temporal resolution via x-ray diffraction (XRD). The spatially periodic femtosecond excitation of a gallium arsenide/aluminum gallium arsenide superlattice results in coherent lattice motions with a 3.5-picosecond period, which was directly monitored by femtosecond x-ray pulses at a 1-kilohertz repetition rate. Small changes (Δ R / R = 0.01) of weak Bragg reflexes ( R = 0.005) were detected. The phase and amplitude of the oscillatory XRD signal around a new equilibrium demonstrate that displacive excitation of the zone-folded acoustic phonons is the dominant mechanism for strong excitation." @default.
- W2025192776 created "2016-06-24" @default.
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- W2025192776 date "2004-12-03" @default.
- W2025192776 modified "2023-10-09" @default.
- W2025192776 title "Coherent Atomic Motions in a Nanostructure Studied by Femtosecond X-ray Diffraction" @default.
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- W2025192776 doi "https://doi.org/10.1126/science.1104739" @default.
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