1. Laboratory for Materials Simulations, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
2. Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
3. The Hamburg Center for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
4. Department of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden
5. Center for Computational Quantum Physics, Flatiron Institute, 162 Fifth Avenue, New York, New York 10010, United States
6. Nano-Bio Spectroscopy Group, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain