Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 45: Poster: Two Dimensional Functional Materials
CPP 45.8: Poster
Mittwoch, 9. März 2016, 18:15–21:00, Poster B2
The Structure and Magnetism of Restacked Spin 1/2 honeycomb RuCl3 single layers — •Daniel Weber1,2, Leslie M. Schoop1, Viola Duppel1, Judith M. Lippmann1,2, Jürgen Nuss1, and Bettina V. Lotsch1,2 — 1Max Planck Institute for Solid State Physics, Heisenbergstr. 1, 70569 Stuttgart — 2University of Munich, Department of Chemistry, Butenandtstr. 5 - 13, 81377
Spin honeycomb materials have gained substantial interest due to their exotic magnetism. However, in all current materials out-of-plane interactions are interfering with the in-plane order, hence a true 2D magnetic honeycomb system is still of demand. Here, we report the exfoliation of the magnetic semiconductor α-RuCl3 into the first halide monolayers and the magnetic characterization of the spin 1/2 honeycomb arrangement of turbostratically stacked RuCl3 monolayers. The exfoliation is based on a reductive lithiation/hydration approach. After an oxidative treatment, cooperative magnetism due to the spin 1/2 state similar to the bulk can be observed. The oxidized pellets of restacked single layers feature a magnetic transition at T = 7 K in the in-plane direction, while the magnetic properties in the out-of-plane direction vastly differ from bulk α-RuCl3. The deliberate introduction of turbostratic disorder to manipulate the spin structure of RuCl3 is of interest for research in frustrated magnetism and complex magnetic order as predicted by the Kitaev-Heisenberg model.