Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 22: Thin Films: Magnetic Coupling Phenomena / Exchange Bias / Magnetic Anisotropy
MA 22.9: Vortrag
Mittwoch, 7. September 2022, 11:30–11:45, H47
Magnetic anisotropy and magnetic ordering of transitionmetal phosphorus trisulfides — •Tae Yun Kim1,2 and Cheol-Hwan Park1,2 — 1Center for Correlated Electron Systems, Institute for Basic Science, Seoul, Korea — 2Department of Physics and Astronomy, Seoul National University, Seoul, Korea
Transition-metal phosphorus trisulfides (TMPS3’s) — a family of antiferromagnetic materials to which FePS3, the first discovered two-dimensional magnetic material [1], belongs — have been regarded as an ideal testbed for studying the strong influence of low dimensionality on the existence of magnetic order. We developed anisotropic magnetic models for TMPS3’s from first-principles calculations; the bulk magnetic properties, including the critical temperatures (TN’s), reported from previous experiments were explained very well [2]. Remarkably, it was predicted by applying our magnetic models to the few-layer cases that monolayer NiPS3 exhibits a fairly high TN, which is in contrast with the conclusion from a recent Raman study that the TN is largely suppressed in monolayer NiPS3 [3]. We discuss how the degeneracy in the magnetic ground state of monolayer NiPS3 changes significantly its polarized Raman spectra, which provides a reconciliation between our theoretical predictions and the previous experimental results as to the existence of magnetic order in monolayer NiPS3.
[1] J.-U. Lee et al., Nano Lett. 16, 7433 (2016)
[2] T. Y. Kim and C.-H. Park, Nano Lett. 21, 10114 (2021)
[3] K. Kim et al., Nat. Commun. 10, 345 (2019)