1. Institute for Superconducting and Electronic Materials,
Australian Institute for Innovative Materials, University of Wollongong, Squires Way, North Wollongong, New South Wales 2500, Australia
2. Shanghai Key Laboratory
of High Temperature Superconductors, Physics Department, Shanghai University, Shanghai 200444, People’s Republic of China
3. Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People’s Republic of China