1. Key Laboratory of Materials Physics of Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
2. School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou City 466001, China
3. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
4. Spallation Neutron Source Science Center, Dongguan 523803, China
5. Department of Physics and Astronomy, University of Padova, Padova I-35131, Italy