A relationship between nonunitary mixed parity superconductivity and magnetism with spin-orbit coupling

TL;DR

This paper reveals a fundamental connection between nonunitary mixed parity superconductivity and magnetism with spin-orbit coupling, showing they share underlying physics and can produce similar effects.

Contribution

It demonstrates that the Hamiltonian for nonunitary mixed parity superconductivity can be transformed into that for magnetism with spin-orbit coupling, unifying their theoretical descriptions.

Findings

Dzyaloshinskii-Moriya interactions in superconductors

Magnetoelectric effects arising from superconductivity

Supercurrent-induced spin currents without magnetism

Abstract

We show that Hamiltonian for nonunitary mixed parity superconductivity can be recast into that for magnetism with spin-orbit coupling by the Schrieffer-Wolff transformation, indicating that nonunitary mixed parity superconductivity and magnetism with spin-orbit coupling can share the same physics. As demonstrations, we discuss the Dzyaloshinskii-Moriya type interactions, magnetoelectric effect, supercurrent-induced spin current, and altermagnetism in nonunitary mixed parity superconductors. All these effects originate purely from superconductivity, without any magnetism and spin-orbit coupling.