1. Key Lab of Materials Physics
2. Anhui Key Lab of Nanomaterials and Nanotechnology
3. Institute of Solid State Physics
4. Chinese Academy of Sciences
5. Hefei 230031
6. Jiangxi Key Laboratory of Surface Engineering
7. Jiangxi Science and Technology Normal University
8. Nanchang
9. P. R. China
10. State Key Laboratory of Environment-friendly Energy Materials
11. Southwest University of Science and Technology
12. Mianyang 621010