1. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei, 230031, P. R. China
2. University of Science and Technology of China, Hefei 230026, P. R. China
3. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, P. R. China