1. Anhui Province Key Laboratory of Biomimetic Sensing and Advanced Robot TechnologyState Key Laboratory of Sensor TechnologyInstitute of Intelligent MachinesHefei Institute of Physical ScienceChinese Academy of Sciences Hefei 230031 China
2. University of Science and Technology of China Hefei 230026 China
3. High Magnetic Field LaboratoryChinese Academy of Sciences, Hefei 230031 Anhui China
4. Key Laboratory of High Magnetic Field and Ion Beam Physical BiologyHefei Institutes of Physical ScienceChinese Academy of Sciences 230031, Hefei Anhui P. R. China
5. Institute of Physical Science and Information TechnologyAnhui University 230031, Hefei Anhui P. R. China