Emergence of Exotic Spin Texture in Supramolecular Metal Complexes on a 2D Superconductor
Viliam Vaňo, Stefano Reale, Orlando J. Silveira, Danilo Longo, Mohammad Amini, Massine Kelai, Jaehyun Lee, Atte Martikainen, Shawulienu Kezilebieke, Adam S. Foster, Jose L. Lado, Fabio Donati, Peter Liljeroth, Linghao Yan
DOI 10.1103/PhysRevLett.133.236203 · Physical Review Letters
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Abstract
Designer heterostructures have offered a very powerful strategy to create exotic superconducting states by combining magnetism and superconductivity. In this Letter, we use a heterostructure platform combining supramolecular metal complexes (SMCs) with a quasi-2D van der Waals superconductor NbSe2. Our scanning tunneling microscopy measurements demonstrate the emergence of Yu-Shiba-Rusinov bands arising from the interaction between the SMC magnetism and the NbSe2 superconductivity. Using x-ray absorption spectroscopy and x-ray magnetic circular dichroism measurements, we show the presence of antiferromagnetic coupling between the SMC units. These result in the emergence of an unconventional 3×3 reconstruction in the magnetic ground state that is directly reflected in real space modulation of the Yu-Shiba-Rusinov bands. The combination of flexible molecular building blocks, frustrated magnetic textures, and superconductivity in heterostructures establishes a fertile starting point to fabricating tunable quantum materials, including unconventional superconductors and quantum spin liquids.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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