1. Shenzhen Key Laboratory of Special Functional Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China
2. School of Materials Science and Engineering Harbin Institute of Technology Shenzhen 518055 China
3. School of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 China
4. Department of Physics Southern University of Science and Technology Shenzhen 518055 China
5. Department of Materials Science and Engineering University of California Berkeley CA 94720 USA
6. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
7. National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230026 China
8. Department of Physics Xiamen University Xiamen 361005 China