1. School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China
2. School of Materials Science and Engineering, Nanchang University, Nanchang 330047, China
3. Department of Physics, Nanjing Normal University, Nanjing 210097, China
4. Department of Information Engineering, College of Applied Science, Jiangxi University of Science and Technology, Ganzhou 341000, China