1. Lomonosov Moscow State University, Leninskie gory, 119991 Moscow, Russia
2. St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
3. Institute of Nanotechnology of Microelectronics RAS, Nagatinskaya str., 16A/11, 115487 Moscow, Russia
4. Elettra - Sincrotrone Trieste S.C.p.A., Area Science Park, I-34012 Basovizza, Trieste, Italy
5. Quantum-Functional
Semiconductor Research Center, Nano Information Technology Academy, Dongguk University, Seoul 100-715, Republic of Korea
6. Institute of Microelectronics Technology and High-Purity Materials Russian Academy of Sciences, Chernogolovka, Moscow district 142432, Russia
7. Donostia International Physics Center (DIPC), Departamento
de Fisica de Materiales and CFM-MPC UPV/EHU, 20080 San Sebastian, Spain
8. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain