1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2019 Jialuo Road, Shanghai 201800, China
2. School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, China
3. Shanghai Synchrotron Radiation Facility, Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 239 Zhangheng Road, Shanghai 201204, China
4. University of Chinese Academy of Sciences, Beijing 100049, China