1. State Key Lab of Superhard Materials, Jilin University, Changchun, People’s Republic of China
2. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo, People’s Republic of China
3. Technical Center for Industrial Product and Raw Material Inspection and Testing of SHCIQ, Shanghai, People’s Republic of China
4. College of Physics and Electronic Engineering, Nanyang Nomal University, Nanyang, People’s Republic of China