Synthesis and characterization of a single-layer conjugated metal–organic structure featuring a non-trivial topological gap

Abstract

A single layer of a two-dimensional conjugated network (Ni3(HITP)2) assembled on a Au(111) surface exhibits a non-trivial topological gap.

Searching for kagome multi-bands and edge states in a predicted organic topological insulator

“…The studied MHK lattice shares a common condition with other experimentally studied networks proposed as OTIs: [19][20][21][22] the edge state is undetectable at the island borders. This happens despite this network gathers all essential ingredients to be an OTI: excellent structural formation, long-range order, the proximity of the kagome multi-band to E F , 25 negligible amount of defects as judged by LEED, STM and ARPES, and a specific theoretical prediction.…”

“…MHK lattices with proposed OTI behaviour have been experimentally grown on different substrates [19][20][21][22] and their electronic properties are studied locally by scanning tunneling spectroscopy (STS). Similar to 2D inorganic topological insulators, their protected states should appear as one-dimensional conducting edge states visible at the border of the 2D domains 23,24 that disperse when connecting the two gapped "bulk" multi-bands.…”

Synthesis and Local Probe Gating of a Monolayer Metal‐Organic Framework

“…Despite the vast number of reports on 3D, bulk MOFs, synthesis and characterization of 2D, single layer MOFs are much more limited. [1][2][3] Intrinsic 2D MOFs are expected to attract increasing attention since they are anticipated to possess exotic electronic properties, such as high electrical conductivity, [4][5][6][7][8] superconductivity, [9,10] topologically non-trivial band structure, [11][12][13][14][15][16][17] halfmetallic ferromagnetism, [18][19][20][21] and quantum spin liquids. [22] To isolate their intrinsic electronic properties from the substrate, synthesis of 2D MOFs on inert surfaces, such as graphene, other van der Waals layered materials, and bulk insulators, is highly desired.…”

Electron Transmission through Coordinating Atoms Embedded in Metal-Organic Nanoporous Networks

“…Their stability can be utilized for condensing guest organic and inorganic adsorbates [12][13][14][15][16][17] and their metal coordination atoms show novel magnetic properties [18,19], catalytic effects [20], and variable valence oxidation states [21]. Moreover, different tessellation patterns can be tailored (hexagonal, square, or quasicrystalline) when rationally playing with the molecular end groups (cyano, pyridyl), coordination atoms (transition metal, rare earth) or the support surface (noble metal, hBN, graphene) [22][23][24], even resulting in theoretically predicted exotic topological properties [25][26][27][28].…”