1. Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
2. St. Petersburg
State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia
3. IFW Dresden, 01171 Dresden Germany
4. Lomonosov Moscow
State University, Leninskie gory 1/3, 119991 Moscow, Russia
5. Donostia
International
Physics Centre, 20018 San Sebastian, Spain
6. IKERBASQUE, Basque
Foundation for Science, 48011 Bilbao, Spain
7. Centro de Física
de Materiales CSIC/UPV-EHU-Materials Physics Center, Manuel Lardizabal 5, 20018 San Sebastian, Spain
8. Departamento Física Aplicada I, Universidad del País Vasco, Manuel Lardizabal 5, 20018 San Sebastian, Spain