1. National University of Science and Technology MISIS, Moscow, 119049 Russia
2. Saint Petersburg State University, Saint Petersburg 198504 Russia
3. A.V. Rzhanov Institute of Semiconductor Physics, Novosibirsk, 630090 Russia
4. Novosibirsk State University, Novosibirsk 630090, Russia
5. V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
6. Kemerovo State University, Kemerovo 650000, Russia