1. Institute of Metallurgy, Ural Branch of Russian Academy of Sciences, 101 Amundsena str., Ekaterinburg 620016, Russia
2. Ural Federal University, 19 Mira str., Ekaterinburg 620002, Russia
3. L.D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, 2 Kosygina str., Moscow 119334, Russia
4. Joint Institute for High Temperatures, Russian Academy of Sciences, 13/2 Izhorskaya str., Moscow 125412, Russia
5. Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region 141700, Russia
6. Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk 142190, Russia