1. Beijing
Key Laboratory of Materials Utilization of Nonmetallic Minerals and
Solid Wastes, National Laboratory of Mineral Materials, School of
Materials Science and Technology, China University of Geosciences, 100083 Beijing, China
2. Department
of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China
3. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China