1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
2. Spallation Neutron Source Science Center, Dongguan 523803, P. R. China
3. Center for High Pressure Science and Technology Advanced Research, Beijing 100193, P. R. China
4. College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
5. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
6. Key Laboratory of Weak-Light Nonlinear Photonics, School of Physics, Nankai University, Tianjin 300071, P. R. China
7. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan