1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
2. School of Physics and Electronics, Henan University, Kaifeng 475004, China
3. U2A Beam line, Carnegie Institution of Washington, Upton, New York 11973, United States
4. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
5. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201204 Shanghai, China