1. College of Physics and Center for Quantum Materials and Devices Institute of Advanced Interdisciplinary Studies Chongqing University Chongqing 401331 P. R. China
2. Beijing Key Laboratory and Institute of Microstructure and Property of Advanced Materials Beijing University of Technology Beijing 100124 P. R. China
3. Center for High Pressure Science and Technology Advanced Research Beijing 100094 P. R. China
4. Analytical and Testing Center Chongqing University Chongqing 401331 P. R. China
5. Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 P. R. China
6. Science Island Branch of Graduate School University of Science and Technology of China Hefei 230026 P. R. China
7. Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 P. R. China
8. University of Chinese Academy of Sciences Beijing 100044 P. R. China
9. Center of Electron Microscopy and State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 P. R. China
10. Department of Physics and Astronomy Clemson University Clemson SC 29634‐0978 USA