1. Anhui Key Laboratory of Information Materials and Deaavices School of Physics and Materials Science Anhui University Hefei China
2. School of Electronic Engineering Huainan Normal University Huainan China
3. Institute of Physical Science and Information Technology Anhui University Hefei China
4. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory Chinese Academy of Sciences Hefei China