Bistability in superconducting rings containing an inhomogeneous Josephson junction

@article{Gaass2008BistabilityIS,
  title={Bistability in superconducting rings containing an inhomogeneous Josephson junction},
  author={Markus Gaass and Stevan Nadj-Perge and Z. Radovi'c and Andreas Bauer and M Aprili and Werner Wegscheider and Christoph Strunk},
  journal={Physical Review B},
  year={2008},
  volume={77},
  pages={024506}
}
We investigate the magnetic response of a superconducting Nb ring containing a ferromagnetic PdNi Josephson junction and a tunnel junction in parallel. Doubling of the switching frequency is observed within certain intervals of the external magnetic field. For sinusoidal current-phase relations in both junctions, our model of a double superconducting quantum interference device (a small two-junction loop that interrupts the larger ring) explains this feature by a sequence of current reversals… 

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TLDR
It is shown that a magnetic field induces 0–π transitions and φ0-junction behaviour, providing a way to manipulate the phase of the supercurrent-carrying edge states and generate spin supercurrents.

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