1. Key Laboratory for Advanced Materials Processing Technology (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
2. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe 76021, Germany
3. Key Laboratory for Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
4. Beijing Computational Science Research Center, Beijing 100193, People's Republic of China
5. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
6. Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Building 340, Nanjing, Jiangsu 210094, People's Republic of China