Affiliation: | a Experimental Physics Department, Urals State Technical University, 19, Mira Street, Ekaterinburg 620002, Russia b Tomsk Polytechnic University, 30, Lenina Street, Tomsk 634021, Russia c Technological Institute of Single Crystals, Siberian branch of RAS, 43, Russkaya Street, Novosibirsk 630058, Russia |