1 Department of Materials Science, Lomonosov Moscow State University, Moscow, 119991, Russia.
2 Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia. trusov@inorg.chem.msu.ru.
3 Department of Materials Science, MSU-BIT University, Shenzhen, Guangdong Province, 517182, P. R. China.
4 Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Moscow Region, 141701, Russia.
5 Kurnakov Institute of General and Inorganic Chemistry RAS, Moscow, 119991, Russia.
6 Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland.
7 Department of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia.