1. Department of Quantum Matter Physics, University of Geneva, 24 quai Ernest Ansermet, CH-1211 Geneva, Switzerland
2. Group of Applied Physics, University of Geneva, 24 quai Ernest Ansermet, CH-1211 Geneva, Switzerland
3. Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
4. Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, BE-1348 Louvain-la-Neuve, Belgium
5. Laboratory of Theory and Simulation of Materials, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
6. Dipartimento di Scienze Fisiche, Informatiche e Matematiche, University of Modena and Reggio Emilia, 41125 Modena, Italy
7. Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland