Coherent atomic motions in a nanostructure studied by femtosecond X-ray diffraction. Export

@article{citeulike:81515, 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 (DeltaR/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.}, address = {Max-Born-Institut f\"{u}r Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin, Germany.}, author = {Bargheer, M. and Zhavoronkov, N. and Gritsai, Y. and Woo, J. C. and Kim, D. S. and Woerner, M. and Elsaesser, T.}, citeulike-article-id = {81515}, citeulike-linkout-0 = {http://dx.doi.org/10.1126/science.1104739}, citeulike-linkout-1 = {http://www.sciencemag.org/cgi/content/abstract/306/5702/1771}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/15576618}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=15576618}, day = {3}, doi = {10.1126/science.1104739}, issn = {1095-9203}, journal = {Science}, keywords = {x-rays}, month = {December}, number = {5702}, pages = {1771--1773}, posted-at = {2005-01-21 16:18:48}, priority = {3}, title = {Coherent atomic motions in a nanostructure studied by femtosecond X-ray diffraction.}, url = {http://dx.doi.org/10.1126/science.1104739}, volume = {306}, year = {2004} }

TY - JOUR ID - citeulike:81515 L3 - citeulike-article-id:81515 N2 - 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 (DeltaR/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. IS - 5702 JF - Science SN - 1095-9203 AD - Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin, Germany. EP - 1773 TI - Coherent atomic motions in a nanostructure studied by femtosecond X-ray diffraction. VL - 306 SP - 1771 KW - x-rays AU - Bargheer, M AU - Zhavoronkov, N AU - Gritsai, Y AU - Woo, JC AU - Kim, DS AU - Woerner, M AU - Elsaesser, T PY - 2004/12/03/ UR - http://dx.doi.org/10.1126/science.1104739 ER -