Superconducting spintronics with magnetically compensated materials

Jacob Wüsthoff Linder, NTNU

Altermagnets have emerged as intriguing materials supporting strongly spin-polarized
currents despite the lack of a net magnetization. We demonstrate that altermagnets
enable several promising functionalities when merged with conventional superconductors.
We predict that altermagnets act as spin-filters for triplet Cooper pairs
and that they can function as cryogenic spin-valves acting as a memory device without stray fields, offering
high storage densities. Finally, we discuss the interplay between p-wave magnetism
and superconductivity both intrinsically in a material and via the proximity effect in a bilayer.
We show that p-wave magnets induce a charge-to-spin conversion in combination with
superconductors that, unexpectedly, is even larger than in the normal state.

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