Approaching the Two-Dimensional Limit of the S = 1/2 Kagome Magnet via Metal-Organic Framework Exfoliation
Year: 2026
Type: preprint
Abstract: Realising chemically programmable two-dimensional magnetic materials is a major challenge in the development of next-generation quantum technologies. Layered magnetic metal–organic frameworks (MOFs) provide an attractive platform because their reticular design enables systematic control over composition, topology, and magnetic interactions while offering the possibility of exfoliation into atomically thin nanosheets. Here, we investigate the layered S = 1/2 kagome MOF, Cu 3 (CO 3 ) 2 ( bipy ) 6 · 2 ClO 4 , whose bulk magnetic structure is most consistently described by ferromagnetic kagome layers that are ferromagnetically correlated to adjacent ones. We develop a micromechanical Scotch tape exfoliation strategy capable of producing few-layer nanosheets and combine synchrotron X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) to demonstrate that the Cu 2+ oxidation state and ferromagnetic behaviour are retained following exfoliation. By showing that magnetic functionality is preserved in the exfoliated kagome MOF nanosheets, this work establishes the promise of layered magnetic MOFs as tuneable platforms for low-dimensional quantum magnetism and provides an important experimental route toward realising the archetypal S = 1/2 kagome magnet in the two-dimensional limit.
Source: ChemRxiv
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223065844