1. College of Civil and Transportation Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
4. Songshan Lake Materials Laboratory, Dongguan 523808, Guangdong, China