1. Laboratory of Diffusion Processes, Ulyanovsk State University, 432017 Ulyanovsk, Russia
2. Institute of Nanotechnology of Microelectronics of the Russian Academy of Science, Moscow 119991, Russia
3. Department of Theoretical Physics, Moscow Institute of Physics and Technology (MIPT), 141700 Dolgoprudny, Russia
4. Scientific–Manufacturing Complex “Technological Centre,” 124498 Moscow, Russia