1. Russian Academy of Sciences, Institute of Solid State Physics, Chernogolovka, Russia
2. Chernogolovka Scientific Center, Russian Academy of Sciences, Chernogolovka, Russia
3. Russian Academy of Sciences, Institute of Microelectronics Technology and High Purity Materials, Chernogolovka, Russia
4. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, Eggenstein-Leopoldshafen, Germany
5. Department of Chemical Physics, National University of Science and Technology “MISiS,” Moscow, Russia