1. Department of Earth System Sciences, Yonsei University, Seoul 03722, Korea
2. NanoCenter & Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
3. State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
4. NanoCenter & Department of Chemistry & Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
5. Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China