1. Novosibirsk State University, Pirogov
2, 630090 Novosibirsk, Russia
2. Rzhanov Institute of Semiconductor Physics RAS, Lavrentiev Ave. 13, 630090 Novosibirsk, Russia
3. Rzhanov Institute of Semiconductor Physics RAS, Novosibirsk Branch “TDIAM”, Lavrentiev Ave. 2/1, Novosibirsk 630090, Russia
4. Semiconductor
Physics, Technische Universität Chemnitz, Chemnitz, Germany