1. Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, People’s Republic of China.
2. Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan.
3. Key Laboratory of Computational Physical Sciences (Ministry of Education), Institute of Computational Physical Sciences, and Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China.
4. Shanghai Qi Zhi Institute, Shanghai 200030, People’s Republic of China.
5. Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA.