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