1. Universidad del País Vasco, Dpto. Física Aplicada I, E-20018 San Sebastián, Spain
2. IPCMS, CNRS UMR 7504, Université de Strasbourg, 67034 Strasbourg, France
3. Fachbereich Physik
und Zentrum für Materialwissenschaften, Philipps-Universität, 35032 Marburg, Germany
4. Donostia International Physics Center, E-20018 Donostia-San Sebastián, Spain
5. Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, E-20018 San Sebastián, Spain
6. Université de Liège, Institut de Physique and European Theoretical Spectroscopy Facility
(ETSF), allée du
6 août, 17 Sart-Tilman, B-4000 Liège, Belgium
7. Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
8. ALBA Synchrotron Light Source, Carretera BP 1413 km 3.3, E-08290 Cerdanyola del Vallès, Spain
9. ICREA, Institució Catalana de Recerca i Estudis Avançats, Lluis
Companys 23, 08010 Barcelona, Spain
10. Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
11. Universidad del País Vasco, Dpto. Física Materiales, E-20018 San Sebastián, Spain