1. Dipartimento di Fisica “E. Pancini,”, Università degli Studi di Napoli Federico II, Napoli, Italy
2. Photon Technology (Zhejiang) Company, Ltd., Jiashan, China
3. CNR-SPIN Institute of Superconductors, Innovative Materials and Devices, Pozzuoli, Italy
4. National Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, China
5. CNR-SPIN Institute of Superconductors, Innovative Materials and Devices, Napoli, Italy