1. School of Micro-Nano Electronics, Zhejiang University, Hangzhou, Zhejiang 311200, China
2. ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, Zhejiang 311200, China
3. Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
4. Istituto per la Microelettronica e i Microsistemi, IMM-CNR, via fosso del cavaliere 100, 00133 Roma, Italy
5. Istituto di Struttura della Materia, ISM-CNR, via fosso del cavaliere 100, 00133 Roma, Italy
6. Solid State Physics and NanoLund, Lund University, Box 118, SE-221 00 Lund, Sweden
7. Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom
8. China Tower Corporation Limited, No. 9 Dongran North Street, Beijing 100195, China
9. London Centre for Nanotechnology, University College London, London WC1H 0AH, United Kingdom
10. Department of Electronic and Electrical Engineering, University College London, London WC1E 7JE, United Kingdom
11. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
12. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310013, China