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4D Visualization of Transitional Structures in Phase Transformations by Electron Diffraction
Abstract
Complex systems in condensed phases involve a multidimensional energy landscape, and knowledge of transitional structures and separation of time scales for atomic movements is critical to understanding their dynamical behavior. Here, we report, using four-dimensional (4D) femtosecond electron diffraction, the visualization of transitional structures from the initial monoclinic to the final tetragonal phase in crystalline vanadium dioxide; the change was initiated by a near-infrared excitation. By revealing the spatiotemporal behavior from all observed Bragg diffractions in 3D, the femtosecond primary vanadium–vanadium bond dilation, the displacements of atoms in picoseconds, and the sound wave shear motion on hundreds of picoseconds were resolved, elucidating the nature of the structural pathways and the nonconcerted mechanism of the transformation.
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Cited by
Oxide Electronics Utilizing Ultrafast Metal-Insulator Transitions
Yang, Z., Ko, C., & Ramanathan, S. (2011) · Annual Review of Materials Research · doi:10.1146/annurev-matsci-062910-100347 · Cited by 1,020
Ultrafast Spectroscopy: State of the Art and Open Challenges
Maiuri, M., Garavelli, M., & Cerullo, G. (2020) · Journal of the American Chemical Society · doi:10.1021/jacs.9b10533 · Cited by 460
Jager, M. F., Ott, C., Kraus, P. M., Kaplan, C. J., Pouse, W., Marvel, R. E., Haglund, R. F., Neumark, D. M., & Leone, S. R. (2017) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1707602114 · Cited by 164
Femtosecond 240-keV Electron Pulses from Direct Laser Acceleration in a Low-Density Gas
Marceau, V., Varin, C., Brabec, T., & Piché, M. (2013) · Physical Review Letters · doi:10.1103/physrevlett.111.224801 · Cited by 65
Metadata
- Authors
- Baum, P., Yang, D.-S., & Zewail, A. H.
- Venue
- Science
- Published
- 2007-11-02
- Volume
- 318
- Issue
- 5851
- Pages
- 788-792
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2102100267
- Cited by
- 571
- References
- 0
- FWCI
- 23.24
- Type
- journal article
- Language
- en
- Open access
- closed
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