1. A.V. Rzhanov Institute of Semiconductor Physics, Pr. Lavrentieva, 13, Novosibirsk
630090, Russia
2. Novosibirsk State University, Pirogov Strasse 2, 630090, Novosibirsk,
Russia
3. Institute of Automation and Electrometry, Koptyug Avenue 1, 630090, Novosibirsk,
Russia
4. Institut für Theoretische Physik, TU Bergakademie Freiberg, Leipziger
Strasse 23, 09596, Freiberg, Germany
5. National Technical University of Belarus, Nezavisimosti Avenue 65, 220013
mink, Belarus
6. Department of
Electrophysics, NCTU, Hsinchu 30010, Taiwan
7. Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz,
Germany