Transport magnetic currents driven by moving kink crystal in chiral helimagnets

TL;DR

This paper demonstrates that moving kink crystals in chiral helimagnets generate bulk transport magnetic currents due to non-equilibrium momentum, with explicit formulas derived for kink mass and current in weak fields.

Contribution

It introduces a novel mechanism for magnetic current generation via moving kink crystals and provides explicit formulas for their inertial mass and associated currents.

Findings

Transport magnetic currents are induced by moving kink crystals.

The inertial mass of the kink crystal is explicitly derived.

Transport currents arise from dynamical off-diagonal long-range order.

Abstract

We show that the bulk transport magnetic current is generated by the moving magnetic kink crystal (chiral soliton lattice) formed in the chiral helimagnet under the static magnetic field applied perpendicular to the helical axis. The current is caused by the non-equilibrium transport momentum with the kink mass being determined by the spin fluctuations around the kink crystal state. An emergence of the transport magnetic currents is then a consequence of the dynamical off-diagonal long range order along the helical axis. We derive an explicit formula for the inertial mass of the kink crystal and the current in the weak field limit.