1. Department of Physics, University of Science and Technology of China 1 , Hefei, Anhui 230026, People's Republic of China
2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences 2 , Hefei, Anhui 230031, People's Republic of China
3. Institute of Advance Studies, Shenzhen University 3 , Shenzhen, Guangdong 518060, People's Republic of China
4. Department of Nuclear Science and Engineering, University of Science and Technology of China 4 , Hefei, Anhui 230026, People's Republic of China
5. School of Physics and Electronic Engineering, Xinjiang Normal University 5 , Urumqi, Xinjiang 830054, China
6. Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China 6 , Hefei, Anhui 230026, People's Republic of China