Unraveling complex magnetism in two-dimensional FeS${}_2$

Abstract

Atomically thin two dimensional magnets have given rise to emergent phenomena due to magnetic exchange and spin-orbit coupling showing a great promise for realizing ultrathin device structures. In this paper, we critically examine the magnetic properties of 2D FeS${}_2$, which has been recently claimed to exhibit room temperature ferromagnetism in the (111) orientation. Our ab initio study based on collinear density functional theory has revealed the ground state as an antiferromagnetic one with an ordering temperature of around 100K along with a signature of spin-phonon coupling, which may trigger a ferromagnetic coupling via strain. Moreover, our calculations based on spin-spirals indicate the possibility of non-collinear magnetic structures, which is also supported by Monte Carlo simulations based on ab initio magnetic exchange parameters. This opens up an excellent possibility to manipulate magnetic structures by the application of directional strain.

arXiv comment6 pages, 3 figures

References in corpus (12)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Two-Dimensional Itinerant Ising Ferromagnetism in Atomically thin Fe3GeTe2
• Intrinsic magnetic topological insulators in van der Waals layered MnBi${}_2$Te${}_4$-family materials
• Room Temperature Intrinsic Ferromagnetism in Epitaxial Manganese Selenide Films in the Monolayer Limit
• Room temperature 2D ferromagnetism in few-layered 1$T$-CrTe${}_2$
• The magnetic properties and structure of the quasi-two-dimensional antiferromagnet CoPS${}_3$
• The magnetic exchange parameters and anisotropy of the quasi-two dimensional antiferromagnet NiPS${}_3$
• Relativistic exchange interactions in CrX${}_3$ (X=Cl, Br, I) monolayers
• Controllable two-dimensional robust multiferroic GaTeCl monolayer with giant ferroelectricity and superior multifunctions
• Apparent Ferromagnetism in Exfoliated Ultra-thin Pyrite Sheets
• The Enhanced Ferromagnetism of Single-Layer CrX3 (X=Br and I) by Van der Waals Engineering