Electric-field control of collective spin excitations in Neel-type skyrmions

TL;DR

This paper shows that electric fields can control the collective spin excitations in Neel-type skyrmions, enabling energy-efficient manipulation of skyrmion dynamics for future magnonic applications.

Contribution

It introduces a method to electrically activate skyrmion eigenmodes via Dzyaloshinskii-Moriya interaction, revealing unique selection rules and enhanced mode control.

Findings

Electric fields activate skyrmion eigenmodes.

Enhanced relative intensity of clockwise mode.

Distinct selection rules for electric and magnetic activation.

Abstract

We demonstrate that an electric field could activate the three low-energy eigenmodes of the Neel-type skyrmion lattice via the electrically induced Dzyaloshinskii-Moriya interaction. In particular, we predict that the relative intensity of the clockwise rotation mode against the counter-clockwise rotation mode is significantly enhanced for the electrical activation in comparison with the magnetic activation. We also discover that the electrically and magnetically active modes obey unique selection rules. These findings promise a fresh pathway towards energy-efficient electrical manipulation of skyrmion excitations for future skyrmion-based magnonics.