Ferroelectricity controlled chiral spin textures and anomalous valley Hall effect in the Janus magnet-based multiferroic heterostructure

TL;DR

This paper demonstrates how electric polarization can control and distinguish topological spin textures in a Janus magnet-based heterostructure, enabling new data encoding methods via anomalous valley Hall effect.

Contribution

It introduces a novel approach to manipulate and identify skyrmionic and ferromagnetic states using electric polarization and transverse voltage in a multiferroic heterostructure.

Findings

Electric polarization-driven skyrmionic states can be distinguished from ferromagnetic states.

Transverse voltage from anomalous valley Hall effect enables explicit identification of magnetic states.

The method offers a new way for data encoding using topological spin textures.

Abstract

Realizing effective manipulation and explicit identification of topological spin textures are two crucial ingredients to make them as information carrier in spintronic devices with high storage density, high data handling speed and low energy consumption. Electric-field manipulation of magnetism has been achieved as a dissipationless method compared with traditional regulations. However, the magnetization is normally insensitive to the electric field since it does not break time-reversal symmetry directly, and distribution of topological magnetic quasiparticles is difficult to maintain due to the drift arising from external fluctuation, which could result in ambiguous recognition between quasiparticles and uniform magnetic background. Here, we demonstrate that electric polarization-driven skyrmionic and uniform ferromagnetic states can be easily and explicitly distinguished by transverse voltage arising from anomalous valley Hall effect in the Janus magnet-based multiferroic heterostructure LaClBr/In2Se3. Our work provides an alternative approach for data encoding, in which data are encoded by combing topological spin textures with detectable electronic transport.