Imaging Gate-Tunable Single-Layer Molecular Kagome Lattices
Abstract
Kagome lattices provide a simple geometry for engineering electronic states that exhibit novel quantum behavior. In conventional kagome materials, however, the relevant states are often embedded in chemically complex three-dimensional crystals and are difficult to isolate or tune. Molecule-based kagome networks offer structural precision and tunability, but have largely been confined to metallic substrates incompatible with 2D devices. Here we report growth of single-layer Ni3(HITP)2 metal-organic frameworks (MOFs) on van der Waals substrates including graphene-based field-effect devices using metal-salt molecular beam epitaxy. Low-temperature scanning tunneling spectroscopy resolves kagome-derived flat-band and van Hove singularity-based spectral features consistent with first-principles calculations. Gating hybrid 2D MOF devices allows us to energetically shift kagome spectral features, thus establishing electrostatic control of chemically programmable 2D kagome electronic lattices.
Related
- Geometry-Controlled Chern transfer and Flat Band Reconstruction in distorted kagome lattices
- Strain-tunable van Hove singularity and superconducting dome in monolayer kagome metal CsTi3Bi5
- Phase stability, charge ordering, and charge-liquid formation in the Falicov-Kimball model on triangular and kagome lattices
- Heterogeneous superconductivity emerging from a charge-stripe state in kagome lattices
- Tunable flat band on the surface of a rhombohedral kagome ferromagnet
BibTeX
@misc{wang2026imaging,
title = {{Imaging Gate-Tunable Single-Layer Molecular Kagome Lattices}},
author = {Ziyi Wang and Rafal Zuzak and Weichen Tang and Haowen Pang and Yutang Qiao and Dhanvanth Balakrishnan and Yuqiao Yan and Aining Hu and Andrew Sun and Takashi Taniguchi and Kenji Watanabe and Feng Wang and Steven G. Louie and Michael F. Crommie},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.18539},
eprint = {2610.18539},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.18539},
}
RIS
TY - UNPB
TI - Imaging Gate-Tunable Single-Layer Molecular Kagome Lattices
AU - Ziyi Wang
AU - Rafal Zuzak
AU - Weichen Tang
AU - Haowen Pang
AU - Yutang Qiao
AU - Dhanvanth Balakrishnan
AU - Yuqiao Yan
AU - Aining Hu
AU - Andrew Sun
AU - Takashi Taniguchi
AU - Kenji Watanabe
AU - Feng Wang
AU - Steven G. Louie
AU - Michael F. Crommie
PY - 2026
DA - 2026/10/13
PB - arXiv
DO - 10.48550/arxiv.2610.18539
UR - https://arxiv.org/abs/2610.18539
AB - Kagome lattices provide a simple geometry for engineering electronic states that exhibit novel quantum behavior. In conventional kagome materials, however, the relevant states are often embedded in chemically complex three-dimensional crystals and are difficult to isolate or tune. Molecule-based kagome networks offer structural precision and tunability, but have largely been confined to metallic substrates incompatible with 2D devices. Here we report growth of single-layer Ni_3(HITP)_2 metal-organic frameworks (MOFs) on van der Waals substrates including graphene-based field-effect devices using metal-salt molecular beam epitaxy. Low-temperature scanning tunneling spectroscopy resolves kagome-derived flat-band and van Hove singularity-based spectral features consistent with first-principles calculations. Gating hybrid 2D MOF devices allows us to energetically shift kagome spectral features, thus establishing electrostatic control of chemically programmable 2D kagome electronic lattices.
ER -