1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences (CAS), Beijing 100190, China.
2. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China.
3. CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China.
4. Collaborative Innovation Center of Quantum Matter, Beijing 100190, China.
5. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA.
6. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.