1. School of Physics and Materials Science and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
2. Jiangsu Laboratory of Advanced Functional Materials, Department of Physics, Changshu Institute of Technology, Changshu 215500, China
3. School of Materials and Mechanic & Electrical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330038, China
4. School of Physics and Electronic Information, Gannan Normal University, China
5. School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China