1. Frontier
Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, China
2. State
Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
3. Department
of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, United States
4. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China