1. Faculty of Materials and Manufacturing Beijing Key Lab of Microstructure and Properties of Advanced Materials Beijing University of Technology Beijing 100124 P. R. China
2. Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Nanjing Jiangsu 210008 P. R. China
3. School of Physics and Microelectronics Zhengzhou University Zhengzhou 450001 China
4. College of Physics and Institute of Advanced Interdisciplinary Studies Chongqing University Chongqing 400044 P. R. China
5. Analytical and Testing Center Chongqing University Chongqing 401331 China
6. Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute Troy NY 12180 USA
7. Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic Technology Beijing Jiaotong University Beijing 100044 China
8. 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 Beijing 100083 China
9. Department of Material Science Zhejiang University Hangzhou 310008 China