1. Ningbo Institute of Technology, Beihang University, 399 Kangda Road, Beilun District, Ningbo315000, P. R. China
2. Department of Physics, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou310024, P. R. China
3. Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou310024, P. R. China
4. School of Physics, Zhejiang University, Hangzhou310058, P. R. China
5. Department of Physics, Fudan University, Shanghai200433, P. R. China