1. Technical Institute of Physics and Chemistry, Chinese Academy
of Sciences, Beijing 100190, China
2. University of the Chinese Academy of Sciences, Beijing 100049, China
3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
4. Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
5. Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
6. Siberian Federal University, Krasnoyarsk 660041, Russia
7. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy
of Sciences, Beijing 100190, China
8. Institute of Functional Crystals, Tianjin University of Technology, Tianjin 300384, P. R. China