1. Center for Nanochemistry Beijing Science and Engineering Center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 P. R. China
2. Department of Condensed Matter Physics Weizmann Institute of Science 7610001 Rehovot Israel
3. International Center for Quantum Materials School of Physics Peking University Beijing 100871 P. R. China
4. CAS Center for Excellence in Superconducting Electronics (CENSE) State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology (SIMIT) Chinese Academy of Sciences Shanghai 200050 P. R. China
5. University of Chinese Academy of Sciences Beijing 100049 P. R. China
6. School of Physical Science and Technology ShanghaiTech University Shanghai 201210 P. R. China
7. Tianjin Key Lab for Rare Earth Materials and Applications Center for Rare Earth and Inorganic Functional Materials School of Materials Science and Engineering National Institute for Advanced Materials Nankai University Tianjin 300350 P. R. China
8. Academy for Advanced Interdisciplinary Studies Peking University Beijing 100871 P. R. China
9. ShanghaiTech Laboratory for Topological Physics ShanghaiTech University Shanghai 201210 P. R. China
10. Collaborative Innovation Center of Quantum Matter Beijing 100084 P. R. China
11. Department of Physics University of Oxford Oxford OX1 3PU UK
12. Collaborative Innovation Center of Quantum Matter Beijing 100871 P. R. China
13. CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing P. R. China