1. Department of Physics, University of Hamburg and Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science, 22761 Hamburg, Germany
2. Ultrafast X-ray Science Lab, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
3. Department of Chemistry and Chemistry Institute of Functional Materials, Pusan National University, Busan 46241, South Korea
4. Center for Free-Electron Laser Science, DESY and The Hamburg Centre for Ultrafast Imaging, 22607 Hamburg, Germany