Publikation: Ultrafast electron crystallography of the cooperative reaction path in vanadium dioxide
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2016
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European Union (EU): 647771
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Direct Visualization of Light-Driven Atomic-Scale Carrier Dynamics in Space and Time DIVI
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Structural dynamics. 2016, 3(3), pp. 034304. eISSN 2329-7778. Available under: doi: 10.1063/1.4953370
Zusammenfassung
Time-resolved electron diffraction with atomic-scale spatial and temporal resolution was used to unravel the transformation pathway in the photoinduced structural phase transition of vanadium dioxide. Results from bulk crystals and single-crystalline thin-films reveal a common, stepwise mechanism: First, there is a femtosecond V-V bond dilation within 300 fs, second, an intracell adjustment in picoseconds and, third, a nanoscale shear motion within tens of picoseconds. Experiments at different ambient temperatures and pump laser fluences reveal a temperature-dependent excitation threshold required to trigger the transitional reaction path of the atomic motions.
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530 Physik
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YANG, Ding-Shyue, Peter BAUM, Ahmed H. ZEWAIL, 2016. Ultrafast electron crystallography of the cooperative reaction path in vanadium dioxide. In: Structural dynamics. 2016, 3(3), pp. 034304. eISSN 2329-7778. Available under: doi: 10.1063/1.4953370BibTex
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title={Ultrafast electron crystallography of the cooperative reaction path in vanadium dioxide},
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journal={Structural dynamics},
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