1. International Laboratory for Quantum Functional Materials of Henan, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
2. College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
3. Henan Provincial Key-Laboratory of Nano-Composite and Applications, School of Information Engineering, Huanghe Science and Technology College, Zhengzhou 450006, China
4. Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials Science and Engineering, Henan University, Kaifeng 475004, China