@article{8b8b6180dfb84438b15a44d4c9c55c9f,
title = "Discovery of Charge Order and Corresponding Edge State in Kagome Magnet FeGe",
abstract = "Kagome materials often host exotic quantum phases, including spin liquids, Chern gap, charge density wave, and superconductivity. Existing scanning microscopy studies of the kagome charge order have been limited to nonkagome surface layers. Here, we tunnel into the kagome lattice of FeGe to uncover features of the charge order. Our spectroscopic imaging identifies a 2×2 charge order in the magnetic kagome lattice, resembling that discovered in kagome superconductors. Spin mapping across steps of unit cell height demonstrates the existence of spin-polarized electrons with an antiferromagnetic stacking order. We further uncover the correlation between antiferromagnetism and charge order anisotropy, highlighting the unusual magnetic coupling of the charge order. Finally, we detect a pronounced edge state within the charge order energy gap, which is robust against the irregular shape fluctuations of the kagome lattice edges. We discuss our results with the theoretically considered topological features of the kagome charge order including unconventional magnetism and bulk-boundary correspondence.",
author = "Yin, {Jia Xin} and Jiang, {Yu Xiao} and Xiaokun Teng and Hossain, {Md Shafayat} and Sougata Mardanya and Chang, {Tay Rong} and Zijin Ye and Gang Xu and Denner, {M. Michael} and Titus Neupert and Benjamin Lienhard and Deng, {Han Bin} and Chandan Setty and Qimiao Si and Guoqing Chang and Zurab Guguchia and Bin Gao and Nana Shumiya and Qi Zhang and Cochran, {Tyler A.} and Daniel Multer and Ming Yi and Pengcheng Dai and Hasan, {M. Zahid}",
note = "Funding Information: M. Z. H. acknowledges support from the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center and Princeton University. M. Z. H. acknowledges visiting scientist support at Berkeley Lab (Lawrence Berkeley National Laboratory) during the early phases of this work. Theoretical and STM works at Princeton University were supported by the Gordon and Betty Moore Foundation (GBMF9461; GBMF4547; M. Z. H.). The theoretical work including ARPES was supported by the U.S. DOE under the Basic Energy Sciences program (Grant No. DOE/BES DE-FG-02-05ER46200; M. Z. H.). T.-R. C. was supported by the Young Scholar Fellowship Program under a MOST grant for the Columbus Program, MOST111-2636-M-006-014, the Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at the National Cheng Kung University (NCKU), the National Center for Theoretical Sciences (Taiwan). The work at Rice was supported by U.S. NSF-DMR-2100741, the Robert A. Welch Foundation under Grants No. C-1839, No. C-2024, and No. C-1411, the U.S. Department Of Energy (DOE) Grants No. DE-SC0021421 and No. DE-SC0018197, and the Gordon and Betty Moore Foundation{\textquoteright}s EPiQS Initiative through Grant No. GBMF9470. The work at Nanyang Technological University was supported by the National Research Foundation, Singapore under its Fellowship Award (NRF-NRFF13-2021-0010). T. N. acknowledges support from the European Union{\textquoteright}s Horizon 2020 research and innovation programme (ERC-StG-Neupert-757867-PARATOP). G. X. acknowledges support from the National Key Research and Development Program of China (2018YFA0307000), and the National Natural Science Foundation of China (11874022). We acknowledge support from South University of Science and Technology of China principal research grant (No. Y01202500). Publisher Copyright: {\textcopyright} 2022 American Physical Society.",
year = "2022",
month = oct,
day = "14",
doi = "10.1103/PhysRevLett.129.166401",
language = "English (US)",
volume = "129",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "16",
}