1. Research Institute of Physics, Southern Federal University, 194 Stachki av., 344090Rostov-on-Don, Russia
2. A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Science, 28 Vavilov Strasse, 119991Moscow, Russia
3. Chemical Department, Moscow State University, 1 Leninskie Gory, 119991Moscow, Russia
4. Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (National Research University), 9 Institutskiy Pereulok, Dolgoprudny, Moscow Region141700, Russia
5. Center for Advanced Mesoscience and Nanotechnology, Moscow Institute of Physics and Technology (National Research University), 9 Institutskiy Pereulok, Dolgoprudny, Moscow Region141700, Russia
6. Research Institute of Solid-State Electronics Materials, MIREA - Russian Technological University (RTU MIREA), 78 Vernadsky prospect, 119454Moscow, Russia
7. Kapitza Institute for Physical Problems RAS, 2 st. Kosygina, 119334Moscow, Russia
8. Institute of Physics, Czech Academy of Sciences, 18200Prague 8, Czech Republic