1. Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, School of Electrical Engineering and Automation, Tianjin Polytechnic University, Tianjin 300387, People’s Republic of China
2. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People’s Republic of China
3. Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, United States of America
4. School of Science, Tianjin Polytechnic University, Tianjin 300387, People’s Republic of China