1. MEPhI Institute of Nanoengineering in Electronics, Spintronics and Photonics, Moscow 115409, Russia
2. Joint Institute for Nuclear Research, Dubna 141980, Russia
3. Faculty of Physics and Technics, L.N. Gumilev Eurasian National University, Astana 010008, Kazakhstan
4. Institute of Nuclear Physics, Almaty 050032, Kazakhstan