Noncollinear magnetism in two-dimensional CrTe$_2$

TL;DR

This study uses multiscale modeling to reveal how structural distortions in monolayer CrTe₂ induce non-collinear magnetism via magnetic frustration and Dzyaloshinskii-Moriya interaction, highlighting strong magnetoelastic coupling in 2D materials.

Contribution

It demonstrates the emergence of non-collinear magnetism in CrTe₂ monolayers due to structural variations and provides detailed insights into the magnetic properties influenced by distortions.

Findings

Different crystal structures induce non-collinear magnetism.

Magnetoelastic coupling is significant in CrTe₂ monolayers.

Structural distortions affect magnetic interactions.

Abstract

The discovery of two-dimensional (2D) van der Waals magnets opened unprecedented opportunities for the fundamental exploration of magnetism in quantum materials and the realization of next generation spintronic devices. Here, based on a multiscale modelling approach that combines first-principles calculations and a Heisenberg model supplied with ab-initio parameters, we report a strong magnetoelastic coupling in a free-standing monolayer of CrTe$_2$. We demonstrate that different crystal structures of a single CrTe$_2$ give rise to non-collinear magnetism through magnetic frustration and emergence of the Dzyaloshinskii-Moriya interaction (DMI). Utilizing atomistic spin dynamics, we perform a detailed investigation of the complex magnetic properties pertaining to this 2D material impacted by the presence of various types of structural distortions akin to charge density waves.