An effective spin model on the honeycomb lattice for the description of magnetic properties in two-dimensional Fe${}_3$GeTe${}_2$

Abstract

Fe${}_3$GeTe${}_2$ attracts significant attention due to technological perspectives of realizing room temperature ferromagnetism in two-dimensional materials. Here we show that due to structural peculiarities of the Fe${}_3$GeTe${}_2$ monolayer, short distance between the neighboring iron atoms induces a strong exchange coupling. This strong coupling allows us to consider them as an effective cluster with a magnetic moment $\sim$5 ${\mu }_B$, giving rise to a simplified spin model on a bipartite honeycomb lattice with the reduced number of long-range interactions. The simplified model perfectly reproduces the results of the conventional spin model, but allows for a more tractable description of the magnetic properties of Fe${}_3$GeTe${}_2$, which is important, e.g., for large-scale simulations. Also, we discuss the role of biaxial strain in the stabilization of ferromagnetic ordering in Fe${}_3$GeTe${}_2$.

7 pages, 7 figures

References in corpus (6)

• Electric Field Effect in Atomically Thin Carbon Films
• Large anomalous Nernst effect in a van der Waals ferromagnet Fe${}_3$GeTe${}_2$
• Elusive Dzyaloshinskii-Moriya interaction in Fe${}_3$GeTe${}_2$ monolayer
• Suppression of Standing Spin Waves in Low-Dimensional Ferromagnets
• Electron transport and scattering mechanisms in ferromagnetic monolayer Fe${}_3$GeTe${}_2$
• An effective spin model on the honeycomb lattice for the description of magnetic properties in two-dimensional Fe${}_3$GeTe${}_2$

Cited by in corpus (2)

• An effective spin model on the honeycomb lattice for the description of magnetic properties in two-dimensional Fe${}_3$GeTe${}_2$
• Phonon-induced renormalization of exchange interactions in metallic two-dimensional magnets