1. Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
3. Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
4. Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, Beijing 100190, China