1. Institute of Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstr. 6, 64289 Darmstadt, Germany
2. Institute of Solid State Physics RAS, 2 Academician Ossipyan Str., 142432 Chernogolovka, Russian Federation
3. Inenergy Group LLC, Electrodnaya Str., 12-1, 111524 Moscow, Russian Federation