1. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China
2. Department of Physics, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
3. Department of Engineering Physics, Tsinghua University, Beijing 100084, China
4. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China
5. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China