1. Institute for Physics of Microstructures Russian Academy of Sciences, GSP-105, Nizhny Novgorod 603950, Russia
2. Center for Advanced Mesoscience and Nanotechnology, Moscow Institute of Physics and Nanotechnology, Institutsky str. 9, Dolgoprudniy 141700, Russia
3. Lobachevsky State University of Nizhny Novgorod, Gagarin Av. 23, Nizhny Novgorod 603022, Russia
4. Osipyan Institute of Solid State Physics Russian Academy of Sciences, Acad. Osipyan str. 2, Chernogolovka 142432, Russia
5. National Research University Higher School of Economics (HSE University), Bolshaya Pecherskaya str. 25/12, Nizhny Novgorod 603155, Russia