1. School of Physics
2. State Key Laboratory of Crystal Materials
3. Shandong University
4. Jinan 250100
5. China
6. Shengyang National Laboratory for Materials Science
7. Institute of Metal Research
8. Chinese Academy of Sciences
9. Shenyang 110016
10. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics
11. Chinese Academy of Science
12. Beijing 100190
13. Department of Mechanical and Materials Engineering
14. Portland State University
15. Portland
16. USA