Influence of Magnetic Scattering on Superfluidity of 3He in Nematic Aerogel

TL;DR

This study investigates how magnetic scattering affects the superfluid phases of 3He in anisotropic aerogels, revealing that boundary conditions and magnetic interactions significantly influence superfluid behavior and phase diagrams.

Contribution

It demonstrates the impact of magnetic scattering channels on superfluid 3He in nematic aerogels, highlighting the role of boundary conditions and low coverage effects.

Findings

Superfluid phase diagram depends on surface coverage.

Magnetic scattering channels influence superfluid phases.

Boundary conditions alter quasiparticle scattering properties.

Abstract

We report results of experiments with superfluid 3He confined in aerogels with parallel strands which lead to anisotropic scattering of 3He quasiparticles. We vary boundary conditions for the scattering by covering the strands by different numbers of atomic 4He layers and observe that the superfluid phase diagram and the nature of superfluid phases strongly depend on the coverage. We assume that the main reason of these phenomena is a magnetic channel of the scattering which becomes important at low coverages. Our results show that the magnetic channel also may be important in other Fermi systems with the triplet pairing.