Interaction Between a Domain Wall and Spin Supercurrent in Easy-cone Magnets

TL;DR

This paper theoretically explores how domain walls and spin supercurrents interact in easy-cone magnets, revealing mutual influence where supercurrents can drive domain walls and vice versa, within a quasi one-dimensional ferromagnetic model.

Contribution

It introduces a theoretical framework for the interaction between domain walls and spin supercurrents in easy-cone magnets, highlighting their mutual influence and dynamics.

Findings

Spin supercurrent can exert torque on a domain wall, driving its motion.

Domain wall motion can generate spin supercurrent under an external field.

The study uses Landau-Lifshitz-Gilbert phenomenology for analysis.

Abstract

A domain wall and spin supercurrent can coexist in magnets with easy-cone anisotropy owing to simultaneous spontaneous breaking of Z$_2$ and U(1) symmetries. Their interaction is theoretically investigated in quasi one-dimensional ferromagnets within the Landau-Lifshitz-Gilbert phenomenology. Specifically, we show that spin supercurrent can exert the torque on a domain wall and thereby drive it. We also show, as a reciprocal phenomenon, a field-induced motion of a domain wall can generate spin supercurrent.