1. State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, 400044 Chongqing, China
2. National Engineering Research Center for Magnesium Alloys, Chongqing University, 400044 Chongqing, China
3. Applied Materials Physics, Department of Materials Science and Engineering, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
4. Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Box 516, SE-75120 Uppsala, Sweden
5. Research Institute for Solid State Physics and Optics, Wigner Research Center for Physics, P.O. Box 49, H-1525 Budapest, Hungary