Time-spliced X-ray Diffraction Imaging
Abstract
Diffraction imaging of non-equilibrium dynamics at atomic resolution is becoming possible with X-ray free-electron lasers. However, there are unresolved problems with applying this method to objects that are confined in only one dimension. Here I show that one-dimensional coherent diffraction imaging is possible by splicing together images recovered from different delays in a time-resolved experiment. This is used to image the time and space evolution of antiferromagnetic order in a complex oxide heterostructure from measurements of a resonant soft X-ray diffraction peak. Mid-infrared excitation of the substrate is shown to lead to a magnetic front that propagates at a velocity exceeding the speed of sound, a critical observation for the understanding of driven phase transitions in complex condensed matter.
Cite
@article{arxiv.1706.01718,
title = {Time-spliced X-ray Diffraction Imaging},
author = {Kenneth R. Beyerlein},
journal= {arXiv preprint arXiv:1706.01718},
year = {2018}
}