1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China.
2. Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, School of Physics, Zhengzhou University, Zhengzhou 450052, China.
3. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
4. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, China.