All-electric control of skyrmion-bimeron transition in van der Waals heterostructures

TL;DR

This paper demonstrates a reversible, electric-field-controlled transition between skyrmions and bimerons in a van der Waals heterostructure, enabling energy-efficient spintronic device applications.

Contribution

It introduces a novel method for controlling topological spin textures via electric polarization reorientation in 2D heterostructures, without external magnetic fields.

Findings

Reversible skyrmion-bimeron transition achieved by electric control.

Transition operates under static and dynamic conditions.

Proposed binary encoding scheme for spintronic applications.

Abstract

Two-dimensional van der Waals materials offer a versatile platform for manipulating atomic-scale topological spin textures. In this study, using first-principles and micromagnetic calculations, we demonstrate a reversible transition between magnetic skyrmions and bimerons in a MoTeI/In_2Se_3 multiferroic heterostructure. The physical origin lies in the reorientation of the easy axis of magnetic anisotropy, triggered by the reversal of ferroelectric polarization. We show that the transition operates effectively under both static and dynamic conditions, exhibiting remarkable stability and flexibility. Notably, this transition can be achieved entirely through electric control, without requiring any external magnetic field. Furthermore, we propose a binary encoding scheme based on the skyrmion-bimeron transition, presenting a promising path toward energy-efficient spintronic applications.