1. Institute of Physics, National Academy of Sciences of Ukraine, 46, pr. Nauky, 03028 Kyiv, Ukraine
2. Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41, pr. Nauky, 03028 Kyiv, Ukraine
3. Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, 3, Krjijanovskogo, 03142 Kyiv, Ukraine
4. The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
5. Ural Federal University, 51, Lenina Ave, 620000 Ekaterinburg, Russia
6. Radiophysical Faculty, Taras Shevchenko Kyiv National University, 4, pr. Akademika Hlushkova, 03022 Kyiv, Ukraine
7. Physics Faculty, Taras Shevchenko Kyiv National University, 4, pr. Akademika Hlushkova, 03022 Kyiv, Ukraine
8. Department of Material Science and Engineering, National Chiao-Tung University, Hsinchu, Taiwan
9. Institute of Physics, Academia Sinica, Taipei 105, Taiwan