Angle-Resolved Magneto-Chiral Anisotropy in a Non-Centrosymmetric Atomic Layer Superlattice

TL;DR

This paper reports the discovery of angle-resolved magneto-chiral anisotropy in a non-centrosymmetric atomic-layer superlattice, revealing chiral spin textures and potential for advanced chiral spintronics applications.

Contribution

It demonstrates angle-resolved eMChE in a specific superlattice structure and links it to chiral spin textures and Dzyaloshinskii-Moriya interactions, a novel insight in chiral spintronics.

Findings

Observation of non-superimposable enantiomers with 45° tilt.

Correlation of tilt with chiral spin textures via microscopy and simulations.

Identification of Dzyaloshinskii-Moriya interaction as key to eMChE.

Abstract

Chirality in solid-state materials has sparked significant interest due to potential applications of topologically-protected chiral states in next-generation information technology. The electrical magneto-chiral effect (eMChE), arising from relativistic spin-orbit interactions, shows great promise for developing chiral materials and devices for electronic integration. Here we demonstrate an angle-resolved eMChE in an A-B-C-C type atomic-layer superlattice lacking time and space inversion symmetry. We observe non-superimposable enantiomers of left-handed and right-handed tilted uniaxial magnetic anisotropy as the sample rotates under static fields, with the tilting angle reaching a striking 45 degree. Magnetic force microscopy and atomistic simulations correlate the tilt to the emergence and evolution of chiral spin textures. The Dzyaloshinskii-Moriya interaction lock effect in competition with Zeeman effect is demonstrated to be responsible for the angle-resolved eMChE. Our findings open up a new horizon for engineering angle-resolved magneto-chiral anisotropy, shedding light on the development of novel angle-resolved sensing or writing techniques in chiral spintronics.