Magnetic Susceptibility of Andreev Bound States in Superfluid ${}^3$He-B

Abstract

Nuclear magnetic resonance measurements of the magnetic susceptibility of superfluid ${}^3$He imbibed in anisotropic aerogel reveal anomalous behavior at low temperatures. Although the frequency shift clearly identifies a low-temperature phase as the $B$ phase, the magnetic susceptibility does not display the expected decrease associated with the formation of the opposite-spin Cooper pairs. This susceptibility anomaly appears to be the predicted high-field behavior corresponding to the Ising-like magnetic character of surface Andreev bound states within the planar aerogel structures.

arXiv commentPublished version

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Cited by in corpus (4)

• Anisotropic paramagnetic response of topological Majorana surface states in the superconductor ${\text{UTe}}_2$
• Surface State Dissipation in Confined 3He-A
• Transport of bound quasiparticle states in a two-dimensional boundary superfluid
• Planar and Nematic Aerogels: DLCA and Superfluid 3He