1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, P. R. China
2. Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang 471023, P. R. China
3. Institute for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus Squires Way, North Wollongong, New South Wales 2522, Australia