1. School of Science, Key Laboratory of High Performance Scientific Computation, Xihua University, Chengdu 610039, China
2. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
3. Physics of Interfaces and Nanomaterials, MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands
4. Bond and Band Engineering Group, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
5. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China