1. Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Moscow Region, Russia
2. Institute of Physics, Czech Academy of Sciences, 18221 Praha 8, Czech Republic
3. Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, 12116 Prague 2, Czech Republic
4. Institute of Automation and Electrometry SB RAS, 630090 Novosibirsk, Russia
5. Sobolev Institute of Geology and Mineralogy, RAS, 630090 Novosibirsk, Russia
6. Novosibirsk State University, 630090 Novosibirsk, Russia
7. Shubnikov Institute of Crystallography, “Crystallography and Photonics”, Russian Academy of Sciences, 119333 Moscow, Russia
8. Skolkovo Institute of Science and Technology, 143026 Moscow, Russia
9. Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
10. Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany
11. Experimental Physics V, University of Augsburg, 86135 Augsburg, Germany
12. 1. Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany