1. School of Microelectronics Xidian University Xi'an 710071 China
2. Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education & International Center for Dielectric Research School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an 710049 China
3. Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of Education and School of Physics and Technology Wuhan University Wuhan 430072 China
4. Wuhan Institute of Quantum Technology Wuhan 430206 China