1. International Laboratory for Quantum Functional
Materials of Henan, and School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China
2. Department of Physics and Research Institute for Natural Sciences, Hanyang University, 17 Haengdang-Dong, Seongdong-Ku, Seoul 133-791, Korea
3. College
of Physics and Materials Science, Henan Normal University, Xinxiang 453000, China
4. International
Center for Quantum Design of Functional Materials (ICQD), Hefei National
Laboratory for Physical Sciences at the Microscale, and Synergetic
Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
5. Key Laboratory for Special Functional Materials of Ministry of Education,
and School of Physics and Electronics, Henan University, Kaifeng 475004, China