Quantized Josephson phase battery

A ferromagnetic Josephson junction with a spin-flipper (magnetic impurity) sandwiched in-between acts as a phase battery that can store quantized amounts of superconducting phase difference phi(0) in the ground state of the junction. Moreover, for such phi(0)-Josephson junction, anomalous Josephson current appears at zero phase difference. We study the properties of this quantum spin-flip scattering-induced anomalous .Josephson current, especially its tenability via misorientation angle between two ferromagnets. Copyright (C) EPLA, 2019