Inverse proximity effects at spin-triplet superconductor-ferromagnet interface

Abstract

We investigate proximity effects in a spin-triplet superconductor (TSC) interfaced with a ferromagnet (FM), assuming different types of magnetic profiles and chiral or helical pairings. The region of the coexistence of spin-triplet superconductivity and magnetism is significantly influenced by the orientation and spatial extension of the magnetization with respect to the spin configuration of the Cooper pairs, resulting in clear-cut anisotropy signatures. A characteristic mark of the inverse proximity effect arises in the induced spin polarization at the TSC-FM interface. This is unexpectedly stronger when the magnetic proximity is weaker, thus unveiling immediate detection signatures for spin-triplet pairs. We show that an anomalous magnetic proximity can occur at the interface between the itinerant ferromagnet SrRuO_{3} and the unconventional superconductor Sr_{2}RuO_{4}. Such scenario indicates the potential to design characteristic inverse proximity effects in experimentally available SrRuO_{3}-Sr_{2}RuO_{4} heterostructures and to assess the occurrence of spin-triplet pairs in the highly debated superconducting phase of Sr_{2}RuO_{4}.