1. Institute
for Superconducting and Electronic Materials, AIIM, 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