1. Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany
2. Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
3. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
4. RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
5. Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
6. The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
7. Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
8. Departments of Physics and Chemistry, University of Toronto, Toronto, Ontario M5S 1A7, Canada