1. Institute of Solid State Physics, Russian Academy of Science, Chernogolovka 142432, Russia
2. Technische Physik and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Universität Würzburg, Am Hubland, Würzburg D-97074, Germany
3. SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, United Kingdom
4. School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA, United Kingdom
5. 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Stuttgart D-70550, Germany
6. Skolkovo Institute of Science and Technology, Novaya Street 100, Skolkovo 143025, Russia
7. A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilova Street 38, Moscow 119991, Russia
8. M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia