1. School of Material Science and Engineering; Beijing Key Laboratory of Environmental Science and Engineering; Beijing Institute of Technology; Beijing 100081 China
2. Collaborative Innovation Center of Electric Vehicles in Beijing; Beijing 100081 China
3. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics; Chinese Academy of Sciences; Beijing 100080 China
4. Collaborative Innovation Center of Quantum Matter; Beijing 100871 China
5. Department of Materials Science and Engineering; Stanford University; Stanford CA 94305 USA
6. SLAC National Accelerator Laboratory; Stanford Institute for Materials and Energy Sciences; 2575 Sand Hill Road Menlo Park CA 94025 USA