1. Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Chemistry for Energy Materials, University of Science & Technology of China, Hefei, Anhui 230026, P. R. China
2. State Key Laboratory of Particle Detection and Electronics, University of Science & Technology of China, Hefei, Anhui 230026, P. R. China
3. High
Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031, P.R. China