Bilayer junction with chiral p-wave superconductor and itinerant ferromagnet: Role of distinct mechanisms for the generation of spin imbalance

Abstract

We have investigated the behavior of a bilayer junction made of a p-wave chiral superconductor and an itinerant ferromagnet, under the assumption of high barrier transparency and in the clean limit. For the ferromagnet two distinct mechanisms for the generation of spin imbalance have been taken into account: a Stoner-like one originated by the presence of a constant exchange field, and a mass asymmetry one generated by a narrowing of the bandwidth of the minority spin carriers with respect to the majority ones. By solving the Bogoliubov-de Gennes equations, we show that the two mechanisms for ferromagnetism lead to different features as concerns the formation at the interface of dominant and sub-dominant superconducting components as well as their propagation in the ferromagnetic side.