1. CAS Key Laboratory of Strongly-coupled Quantum Matter Physics Department of Physics University of Science and Technology of China Hefei Anhui 230026 China
2. Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid-State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 China
3. Center for Spintronics and Quantum Systems State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China
4. Instruments Center for Physical Science University of Science and Technology of China Hefei Anhui 230026 China