1. School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
2. National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba 305–8565 Japan
3. Department of Physics Southern University of Science and Technology Shenzhen 518055 China
4. Department of Physics and Astronomy Vanderbilt University Nashville TN 37235 USA
5. Materials Science and Technology Division Oak Ridge National Lab Oak Ridge TN 37831 USA
6. Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
7. College of electronic information and optical engineering Nankai University Tianjin 300350 China
8. State Key Laboratory of ASIC & System School of Information Science and Technology Fudan University Shanghai 200433 P. R. China
9. Department of Mechanical Engineering and Materials Science and Institute of Materials Science and Engineering Washington University in St. Louis St. Louis MO 63130 USA
10. School of Electronic Electrical and Communication Engineering University of Chinese Academy of Science Beijing 100049 China
11. CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100049 China
12. Centre for Micro‐/Nano‐electronics (NOVITAS) School of Electrical & Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
13. CINTRA CNRS/NTU/THALES UMI 3288 Research Techno Plaza 50 Nanyang Drive, Border X Block, Level 6 Singapore 637553 Singapore
14. School of Physical Sciences and CAS Key Laboratory of Vacuum Sciences University of Chinese Academy of Sciences Beijing 100049 China