1. Institute of High Performance Computing, Agency for Science Technology and Research, 1 Fusionopolis Way, 16-16 Connexis, 138632 Singapore
2. College of Materials Science and Engineering, Jilin University, 130012 Changchun, China
3. Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
4. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6056, USA