1. TU Bergakademie Freiberg, Institut für Experimentelle Physik, Leipziger Straße 23, 09596 Freiberg (Germany)
2. Samara Center for Theoretical Materials Science (SCTMS), Samara State University, Ac. Pavlov Street 1, 443011 Samara (Russia)
3. Samara State Aerospace University named after academician S.P. Korolyev (National Research University), Moskovskoye Shosse 34, 443086 Samara (Russia)