Orbital-engineered px,y-kagome lattice in a halogen monolayer
Abstract
Multi-orbital kagome lattices with explicit orbital degrees of freedom remain largely unexplored, as most experimentally realized systems rely on complex d-electron manifolds that are approximated by isotropic single-orbital models. Here, we overcome this limitation by realizing a px,y-orbital kagome lattice through deposition of a Br monolayer on Ag(111), where orbital filtering selectively suppresses the pz channel. Scanning tunneling microscopy, angle-resolved photoemission spectroscopy, and density-functional-theory calculations reveal a large-area, highly ordered kagome structure whose band dispersions quantitatively match the anisotropic px,y tight-binding model. To extract the intrinsic manifold from the substrate background, we construct an effective H-passivated model, which uncover the intrinsic electronic structure and reveals nontrivial topological characteristics of the px,y kagome manifold driven by first-order spin-orbit coupling effect. Our work establishes Br/Ag(111) as an experimentally accessible platform for multi-orbital kagome physics, extending the kagome paradigm from the conventional d-orbital regime to an orbitally engineered topological setting.
Related
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BibTeX
@misc{liu2026orbitalengineered,
title = {{Orbital-engineered px,y-kagome lattice in a halogen monolayer}},
author = {Xulin Liu and Jingyi Duan and Yueqian Chen and Wenbo Liu and Peiyao Xiao and Yuxiang Liu and Pei Liu and Minjun Wang and Baojie Feng and Dongfei Wang and Xun Shi and Wei Jiang and Yugui Yao and Wende Xiao},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.36450},
eprint = {2609.36450},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.36450},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Orbital-engineered px,y-kagome lattice in a halogen monolayer
AU - Xulin Liu
AU - Jingyi Duan
AU - Yueqian Chen
AU - Wenbo Liu
AU - Peiyao Xiao
AU - Yuxiang Liu
AU - Pei Liu
AU - Minjun Wang
AU - Baojie Feng
AU - Dongfei Wang
AU - Xun Shi
AU - Wei Jiang
AU - Yugui Yao
AU - Wende Xiao
PY - 2026
DA - 2026/09/29
PB - arXiv
DO - 10.48550/arxiv.2609.36450
UR - https://arxiv.org/abs/2609.36450
AB - Multi-orbital kagome lattices with explicit orbital degrees of freedom remain largely unexplored, as most experimentally realized systems rely on complex d-electron manifolds that are approximated by isotropic single-orbital models. Here, we overcome this limitation by realizing a px,y-orbital kagome lattice through deposition of a Br monolayer on Ag(111), where orbital filtering selectively suppresses the pz channel. Scanning tunneling microscopy, angle-resolved photoemission spectroscopy, and density-functional-theory calculations reveal a large-area, highly ordered kagome structure whose band dispersions quantitatively match the anisotropic px,y tight-binding model. To extract the intrinsic manifold from the substrate background, we construct an effective H-passivated model, which uncover the intrinsic electronic structure and reveals nontrivial topological characteristics of the px,y kagome manifold driven by first-order spin-orbit coupling effect. Our work establishes Br/Ag(111) as an experimentally accessible platform for multi-orbital kagome physics, extending the kagome paradigm from the conventional d-orbital regime to an orbitally engineered topological setting.
ER -