On-surface Assembly of Au-Dicyanoanthracene Coordination Structures on Au(111)

Abstract

On-surface metal-organic coordination provides a promising way for synthesizing different two-dimensional lattice structures that have been predicted to possess exotic electronic properties. Using scanning tunneling microscopy (STM) and spectroscopy (STS), we studied the supramolecular self-assembly of 9,10-dicyanoanthracene (DCA) molecules on the Au(111) surface. Close-packed islands of DCA molecules and Au-DCA metal-organic coordination structures coexist on the Au(111) surface. Ordered DCA${}_3$Au${}_2$ metal-organic networks have a structure combining a honeycomb lattice of Au atoms with a kagome lattice of DCA molecules. Low-temperature STS experiments demonstrate the presence of a delocalized electronic state containing contributions from both the gold atom states and the lowest unoccupied molecular orbital of the DCA molecules. These findings are important for the future search of topological phases in metal-organic networks combining honeycomb and kagome lattices with strong spin-orbit coupling in heavy metal atoms.

References in corpus (13)

• The electronic properties of graphene
• Topological Insulators
• Topological insulators and superconductors
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• On-surface synthesis of graphene nanoribbons with zigzag edge topology
• Artificial flat band systems: from lattice models to experiments
• Artificial graphene as a tunable Dirac material
• Organic Topological Insulators in Organometallic Lattices
• Flat Chern Band in a Two-Dimensional Organometallic Framework
• Superconducting Two-Dimensional Metal-Organic Framework
• Two-dimensional band structure in honeycomb metal-organic frameworks
• Artificial graphenes: Dirac matter beyond condensed matter
• Single- and many-particle description of scanning tunneling spectroscopy

Cited by in corpus (5)

• Manifestation of strongly correlated electrons in a 2D kagome metal-organic framework
• A Two-Dimensional Metal-Organic Framework on Superconducting NbSe${}_2$
• Selective Activation of Aromatic C-H Bonds Catalyzed by Single Gold Atoms at Room Temperature
• Synthesis and Local Probe Gating of a Monolayer Metal-Organic Framework
• Local gate control of Mott metal-insulator transition in a 2D metal-organic framework