1. Department of Physics, Renmin University of China, Beijing 100872, China
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, China
4. School of Physical Sciences, University of Chinese Academy of Science, Beijing 100190, China
5. Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
6. Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education), Renmin University of China, Beijing 100872, China
7. Laboratory for Neutron Scattering, Renmin University of China, Beijing 100872, China