1. Physics Department, International Centre for Quantum and Molecular Structures, Materials Genome Institute, Shanghai University, Shanghai 200444, China
2. Shanghai Key Laboratory of High-Temperature Superconductors, Shanghai University, Shanghai 200444, China
3. CNR-SPIN, c/o Dip.to di Scienze Fisiche e Chimiche - Via Vetoio - 67100 - Coppito (AQ), Italy
4. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China