1. St. Petersburg State University, 7/9 Universitetskaya nab, St. Petersburg, 199034, Russia
2. II Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany
3. IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany
4. Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
5. Donostia International Physics Center (DIPC), Departamento de Fisica de Materiales and CFM-MPC UPV/EHU, 20080 San Sebastian, Spain
6. Tomsk State University, Lenina Avenue, 36, 634050 Tomsk, Russia
7. Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences, Pervomayskaya Street 91, 620990 Ekaterinburg, Russia
8. M.V. Lomonosov Moscow State University, Leniskie Gory 1/3 199991 Moscow, Russia
9. Institute of Solid
State Physics, Dresden University of Technology, 01062 Dresden, Germany
10. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain