1. The Beijing Municipal Key Laboratory of New Energy Materials and Technologies School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3. Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
4. Siberian Federal University, Krasnoyarsk 660041, Russia
5. Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
6. University of Chinese Academy of Sciences, Beijing 100049, China