[1] Van der Waals-Zeeman Institute, University of Amsterdam, Valckenierstraat 65, NL-1018 XE Amsterdam, Netherlands
[2] Intl. Train. Inst. for Mat. Science, ITIMS Building, Dai hoc Bach Khoa Hanoi, 1 Dai Co Viet Road, Hanoi, Viet Nam
[3] Inst. for Physics of Microstructures, Russian Academy of Sciences, GSP-105, Nizhny Novgorod, RU-603600, Russia