Altermagnetic Multiferroics: Symmetry-Locked Magnetoelectric Coupling

TL;DR

This paper introduces altermagnetic multiferroics, a new class of materials with unique symmetry properties that enable zero net magnetization and strong magnetoelectric effects, promising for low-power spintronic applications.

Contribution

It presents the concept of altermagnetic multiferroics, highlighting their symmetry-locked magnetoelectric coupling and potential advantages over traditional multiferroics.

Findings

Zero net magnetization eliminates stray fields

Momentum-dependent spin splitting enables electric control of spin currents

Strong intrinsic magnetoelectric coupling from spin-space symmetry

Abstract

Multiferroics exhibit significant potential for low-power spintronic devices due to magnetoelectric coupling. Here, we discuss an emerging class of altermagnetic multiferroics, a system demonstrating distinct advantages including zero net magnetization (eliminating stray fields), momentum-dependent spin splitting (enabling electric-field control of spin currents), and intrinsic strong magnetoelectric coupling originating from spin-space symmetry.