1. Department of Physics, Zhejiang University, Hangzhou 310027, China
2. Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, China
3. Department of Physics, Fudan University, Shanghai 200433, China
4. School of Engineering, Westlake University, Hangzhou, 310024, China
5. Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, Westlake University, Hangzhou 310024, China