1. Faculty of Physics and Center for Nanointegration (CENIDE); University of Duisburg-Essen; Duisburg Allemagne
2. Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute; Forschungszentrum Jülich; Jülich Allemagne
3. High Magnetic Field Laboratory; Chinese Academy of Science (CAS); Hefei Chine