1. School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
2. School of Advanced Interdisciplinary Studies, Ningxia University, Zhongwei 755000, China
3. Department of Basic Courses, Officers College of PAP, Chengdu 610213, China
4. Center of Condensed Matter and Material Physics, School of Physics, Beihang University, Beijing 100191, China