1. B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Nauki
Ave., Kharkiv 61103, Ukraine
2. Institute for Condensed Matter Physics, TU Braunschweig, Braunschweig D-38106, Germany
3. O.O. Galkin Donetsk Institute for Physics and Engineering of the National Academy of Sciences of Ukraine, 46 Nauki Ave.,
Kyiv 03680, Ukraine
4. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
5. School of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660041,
Russia