1. G.V. Kurdyumov Institute for Metal Physics, NASU, 36 Acad. Vernadsky Boulevard, Kyiv 03680, Ukraine
2. Vasyl’ Stus Donetsk National University, Vinnytsia 21021, Ukraine
3. Institute of Physics, PAS, 32/46Al. Lotników, Warsaw 02-668, Poland
4. o.o Galkin Donetsk Institute of Physics and Engineering, 46 Nauki Ave., Kyiv 03680, Ukraine
5. Ioffe Physico-Technical Institute RAS, St.-Petersburg 194021, Russia
6. Faculty of Chemistry, Ivan Franko National University of Lviv, 6 Kyryla i Mephodia Str., Lviv 79005, Ukraine
7. Institute of Physics, Jagiellonian University, 4 Reymonta, Kraków 30-059, Poland
8. Institute of Physics, Krakow University of Technology, 1 Podchorążych, Krakow 30-084, Poland