1. Department of Physics, Southern University of Science and Technology, Shenzhen 518055, P. R. China
2. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, P. R. China
3. Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen 518110, P. R. China
4. Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research, Dresden 01069, Germany