Electric-Field-Induced Skyrmion Distortion and Giant Lattice Rotation in the Magnetoelectric InsulatorCu2OSeO3

Abstract

Uniquely in ${\mathrm{Cu}}_2{\mathrm{OSeO}}_3$, the Skyrmions, which are topologically protected magnetic spin vortexlike objects, display a magnetoelectric coupling and can be manipulated by externally applied electric ($E$) fields. Here, we explore the $E$-field coupling to the magnetoelectric Skyrmion lattice phase, and study the response using neutron scattering. Giant $E$-field induced rotations of the Skyrmion lattice are achieved that span a range of $\sim 25°$. Supporting calculations show that an $E$-field-induced Skyrmion distortion lies behind the lattice rotation. Overall, we present a new approach to Skyrmion control that makes no use of spin-transfer torques due to currents of either electrons or magnons.