1. High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, P. R. China
2. University of Science and Technology of China, Hefei 230036, Anhui, P. R. China
3. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, Anhui, P. R. China