1. Faculty of Physics, St. Petersburg State University, 199034 St. Petersburg, Russia
2. Laboratory for the Epitaxial Nanotechnologies, Alferov University, 194021 St. Petersburg, Russia
3. Centre of Nanoheterostructure Physics, Ioffe Institute RAS, 194021 St. Petersburg, Russia
4. Laboratory of Structural and Phase Transformations in Condensed Matter, Institute of Problems of Mechanical Engineering RAS, 199178 St. Petersburg, Russia