1. School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
2. Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, China
3. Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
4. Department of Physics and Centre for Advanced Two-Dimensional Materials, National University of Singapore, 117551, Singapore