1. College of Physics and Information Engineering, Quanzhou Normal University, Quanzhou, Fujian 362000, P. R. China
2. Automotive Research Institute, Tsinghua University, Beijing 100084, P. R. China
3. Beijing Computational Science Research Center, Beijing 100084, P. R. China
4. Department of Physics, Xiamen University, Xiamen, Fujian 361005, P. R. China