1. Key Laboratory for Special Functional Materials of Ministry of Education, and School of Materials Science and Engineering, Henan University, Kaifeng 475004, China
2. School of Physics, and National Demonstration Center for Experimental Physics Education, Henan Normal University, Xinxiang 453007, China
3. International Laboratory for Quantum Functional Materials of Henan, and School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China