Growth of mesoscale ordered two-dimensional hydrogen-bond organic framework with the observation of flat band

Minghu Pan*, Xin Zhang, Yinong Zhou, Pengdong Wang, Qi Bian, Hang Liu, Xingyue Wang, Xiaoyin Li, Aixi Chen, Lei Xiaoxu, Shaojian Li, Zhengwang Cheng, Zhibin Shao, Haoxuan Ding, Jianzhi Gao, Fangsen Li, feng liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

129 Downloads (Pure)

Abstract

Flat bands (FBs), presenting a strongly interacting quantum system, have drawn increasing interest recently. However, experimental growth and synthesis of FB materials have been challenging and have remained elusive for the ideal form of monolayer materials where the FB arises from destructive quantum interference as predicted in 2D lattice models. Here, we report surface growth of a self-assembled monolayer of 2D hydrogen-bond (H-bond) organic frameworks (HOFs) of 1,3,5-tris(4-hydroxyphenyl)benzene (THPB) on Au(111) substrate and the observation of FB. High-resolution scanning tunneling microscopy or spectroscopy shows mesoscale, highly ordered, and uniform THPB HOF domains, while angle-resolved photoemission spectroscopy highlights a FB over the whole Brillouin zone. Density-functional-theory calculations and analyses reveal that the observed topological FB arises from a hidden electronic breathing-kagome lattice without atomically breathing bonds. Our findings demonstrate that self-assembly of HOFs provides a viable approach for synthesis of 2D organic topological materials, paving the way to explore many-body quantum states of topological FBs.
Original languageEnglish
Article number036203
Number of pages7
JournalPhysical Review Letters
Volume130
Issue number3
DOIs
Publication statusPublished - 20 Jan 2023

Fingerprint

Dive into the research topics of 'Growth of mesoscale ordered two-dimensional hydrogen-bond organic framework with the observation of flat band'. Together they form a unique fingerprint.

Cite this