Anomalous inverse proximity effect in unconventional-superconductor junctions*

We investigate the effects of Andreev bound states due to the unconventional pairing on the inverse proximity effect of ferromagnet/superconductor junctions. Utilizing quasiclassical Eilenberger theory, we obtain the magnetization penetrating into the superconductor. We show that the direction of the induced magnetization is determined by two factors: whether Andreev bound states are present at the junction interface and the sign of the spin-mixing angle. In particular, when the Andreev bound states appear at the interface, the direction of the induced magnetization is opposite to that without Andreev bound states. Applying this novel effect, we can distinguish the pairing symmetry of a superconductor.