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Open AccessArticle

Unusual Breathing Behavior of Optically Excited Barium Titanate Nanocrystals

1
London Centre for Nanotechnology, University College London, London WC1E 6BT, UK
2
Argonne National Laboratory, Argonne, Lemont, IL 60439, USA
3
Brookhaven National Laboratory, Upton, NY 11973, USA
4
Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
5
School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
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Key Laboratory of Advanced Civil Engineering Materials, Tongji University, Shanghai 201804, China
7
SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
8
ISIS Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire OX11 0QX, UK
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(5), 365; https://doi.org/10.3390/cryst10050365
Received: 9 April 2020 / Revised: 21 April 2020 / Accepted: 29 April 2020 / Published: 1 May 2020
(This article belongs to the Special Issue Coherent X-ray Scattering)
Coherent X-ray diffraction patterns were recorded by using an X-ray free-electron laser to illuminate barium titanate nanocrystals as a function of time delay after laser excitation. Rather than seeing any significant thermal expansion effects, the diffraction peaks were found to move perpendicular to the momentum transfer direction. This suggests a laser driven rotation of the crystal lattice, which is delayed by the aggregated state of the crystals. Internal deformations associated with crystal contacts were also observed. View Full-Text
Keywords: X-ray pump-probe; coherent imaging; ferroelectric oxide X-ray pump-probe; coherent imaging; ferroelectric oxide
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MDPI and ACS Style

Diao, J.; Cherukara, M.; Harder, R.; Huang, X.; Zhang, F.; Chen, B.; Ulvestad, A.; Song, S.; Zhu, D.; Keen, D.; Robinson, I. Unusual Breathing Behavior of Optically Excited Barium Titanate Nanocrystals. Crystals 2020, 10, 365.

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