The CSIRO Applied Superconductivity Group has a long-term effort in research and development of superconducting electronic devices and systems for various practical applications. In this talk, I will give an overview of CSIRO research activities in developing high-Tcsuperconducting (HTS) Josephson junction devices for various applications. I will firstly describe the CSIRO-developed HTS step-edge Josephson junction technology and its basic application in Superconducting Quantum Interference Devices (SQUIDs). I will then describe in more detail our recent research progress on developing high-Tcsuperconducting (HTS) Josephson devices for microwave and terahertz (THz) applications.
Tuning the 0
−π Josephson junction with a high spin molecule: Role of tunnel contacts, exchange coupling, electron-electron interactions and high spin states
We propose Josephson junction with a high spin molecule sandwiched between two superconductors. This system shows a
π junction behaviour as a function of the spin magnetic moment state of the molecule, the interface transparency, exchange coupling and electron-electron interactions in the system. The system is theoretically analysed for possible reason behind the
π shift. The crucial role of spin flip scattering is highlighted. Possible applications in quantum computation of our proposed tunable high spin molecule
π junction is underscored.