1. School of Materials Science and Engineering, Nanchang University, Nanchang 330047, China
2. Faculty of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
3. School of Science, Nanchang University, Nanchang 330047, China
4. Institute for Fusion Theory and Simulation and Department of Physics, Zhejiang University, Hangzhou 310027, China