A Two-Dimensional Metal-Organic Framework on Superconducting NbSe${}_2$

Abstract

The combination of two-dimensional (2D) materials into vertical heterostructures has emerged as a promising path to designer quantum materials with exotic properties. Here, we extend this concept from inorganic 2D materials to 2D metal-organic frameworks (MOFs) that offer additional flexibility in realizing designer heterostructures. We successfully fabricate a monolayer 2D Cu-dicyanoanthracene MOF on a 2D van der Waals NbSe${}_2$ superconducting substrate. The structural and electronic properties of two different phases of the 2D MOF are characterized by low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS), complemented by density-functional theory (DFT) calculations. These experiments allow us to follow the formation of the kagome bandstructure from Star of David -shaped building blocks. This work extends the synthesis and electronic tuneability of 2D MOFs beyond the electronically less relevant metal and semiconducting surfaces to superconducting substrates, which are needed for the development of emerging quantum materials such as topological superconductors.

References in corpus (7)

• Evidence of high-temperature exciton condensation in 2D atomic double layers
• Moiré heterostructures as a condensed matter quantum simulator
• Engineering symmetry breaking in two-dimensional layered materials
• Principles and simulations of high-resolution STM imaging with flexible tip apex
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• Quantized charge transport in chiral Majorana edge modes
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Cited by in corpus (10)

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• Correlation-induced magnetism in substrate-supported 2D metal-organic frameworks
• Local gate control of Mott metal-insulator transition in a 2D metal-organic framework
• Two-dimensional Kagome Materials: Theoretical Insights, Experimental Realizations, and Electronic Structures
• Yu-Shiba-Rusinov bands in a self-assembled kagome lattice of magnetic molecules
• Spin Excitations of High Spin Iron(II) in Metal-Organic Chains on Metal and Superconductor
• Emergence of Exotic Spin Texture in Supramolecular Metal Complexes on a 2D Superconductor
• Altermagnetic Metal-Organic Frameworks
• Geometry-Driven Moiré Engineering in Twisted Bilayers of High-Pseudospin Fermions