1. College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
2. School of Micro-Nano Electronics, Zhejiang University, Hangzhou, Zhejiang 311200, China
3. College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, Fujian, China
4. Institute for Materials Discovery, University College London, Roberts Building, Malet Place, London WC1E 7JE, United Kingdom
5. Department of Electronic and Electrical Engineering, University College London, London WC1E 7JE, United Kingdom
6. Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
7. Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
8. London Centre for Nanotechnology, University College London, London WC1H 0AH, United Kingdom