V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, G. V. Kurdyumov Institute for Metal Physics, National Technical University of Ukraine - Igor Sikorsky Kyiv Polytechnic Institute - National Technical University of Ukraine - Igor Sikorsky Kyiv Polytechnic Institute, Students, V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, G. V. Kurdyumov Institute for Metal Physics, V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, G. V. Kurdyumov Institute for Metal Physics, G. V. Kurdyumov Institute for Metal Physics and G. V. Kurdyumov Institute for Metal Physics