Magnetization of superfluid He-3 in periodic structures

Triplet p-wave superfluid He-3 has multiple superfluid phases with different spin structures and different magnetic properties, that are used to identify these phases experimentally. Similar techniques are important for identification of other unconventional superconductors. These properties are modified in confined geometries and near impurities, such as aerogel, due to presence of surface Andreev states. Andreev quasiparticle states near fully reflective surfaces are a manifestation of the topological properties of the superfluid, and they create special magnetic environment different from the bulk. Using the scattering matrix approach and quasiclassical technique, we investigate the spectrum of Andreev states near semi-transparent interfaces, including periodic structures made out of such interfaces, and focus on their influence on the magnetization of the superfluid states.

This research is supported by NSF grant DMR-2023928.