Discovery of charge order and corresponding edge state in kagome magnet FeGe
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...
Saved in:
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2022
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/163569 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-163569 |
---|---|
record_format |
dspace |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
Science::Physics::Electricity and magnetism Antiferromagnetism Charge Density |
spellingShingle |
Science::Physics::Electricity and magnetism Antiferromagnetism Charge Density Yin, Jia-Xin Jiang, Yu-Xiao Teng, Xiaokun Md. Shafayat Hossain Mardanya, Sougata Chang, Tay-Rong Ye, Zijin Xu, Gang Denner, M. Michael Neupert, Titus Lienhard, Benjamin Deng, Han-Bin Setty, Chandan Qimiao Si Chang, Guoqing Guguchia, Zurab Gao, Bin Shumiya, Nana Zhang, Qi Cochran, Tyler A. Multer, Daniel Yi, Ming Dai, Pengcheng M. Zahid Hasan Discovery of charge order and corresponding edge state in kagome magnet FeGe |
description |
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. |
author2 |
School of Physical and Mathematical Sciences |
author_facet |
School of Physical and Mathematical Sciences Yin, Jia-Xin Jiang, Yu-Xiao Teng, Xiaokun Md. Shafayat Hossain Mardanya, Sougata Chang, Tay-Rong Ye, Zijin Xu, Gang Denner, M. Michael Neupert, Titus Lienhard, Benjamin Deng, Han-Bin Setty, Chandan Qimiao Si Chang, Guoqing Guguchia, Zurab Gao, Bin Shumiya, Nana Zhang, Qi Cochran, Tyler A. Multer, Daniel Yi, Ming Dai, Pengcheng M. Zahid Hasan |
format |
Article |
author |
Yin, Jia-Xin Jiang, Yu-Xiao Teng, Xiaokun Md. Shafayat Hossain Mardanya, Sougata Chang, Tay-Rong Ye, Zijin Xu, Gang Denner, M. Michael Neupert, Titus Lienhard, Benjamin Deng, Han-Bin Setty, Chandan Qimiao Si Chang, Guoqing Guguchia, Zurab Gao, Bin Shumiya, Nana Zhang, Qi Cochran, Tyler A. Multer, Daniel Yi, Ming Dai, Pengcheng M. Zahid Hasan |
author_sort |
Yin, Jia-Xin |
title |
Discovery of charge order and corresponding edge state in kagome magnet FeGe |
title_short |
Discovery of charge order and corresponding edge state in kagome magnet FeGe |
title_full |
Discovery of charge order and corresponding edge state in kagome magnet FeGe |
title_fullStr |
Discovery of charge order and corresponding edge state in kagome magnet FeGe |
title_full_unstemmed |
Discovery of charge order and corresponding edge state in kagome magnet FeGe |
title_sort |
discovery of charge order and corresponding edge state in kagome magnet fege |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/163569 |
_version_ |
1759857357505953792 |
spelling |
sg-ntu-dr.10356-1635692023-02-28T20:02:23Z Discovery of charge order and corresponding edge state in kagome magnet FeGe Yin, Jia-Xin Jiang, Yu-Xiao Teng, Xiaokun Md. Shafayat Hossain Mardanya, Sougata Chang, Tay-Rong Ye, Zijin Xu, Gang Denner, M. Michael Neupert, Titus Lienhard, Benjamin Deng, Han-Bin Setty, Chandan Qimiao Si Chang, Guoqing Guguchia, Zurab Gao, Bin Shumiya, Nana Zhang, Qi Cochran, Tyler A. Multer, Daniel Yi, Ming Dai, Pengcheng M. Zahid Hasan School of Physical and Mathematical Sciences Science::Physics::Electricity and magnetism Antiferromagnetism Charge Density 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. National Research Foundation (NRF) Submitted/Accepted version M.Z.H. acknowledges support from the US 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 was supported by the Gordon and Betty Moore Foundation (GBMF9461; GBMF4547; M.Z.H.). The theoretical work including ARPES were supported by the US DOE under the Basic Energy Sciences program (grant number 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 US NSF-DMR-2100741, the Robert A. Welch Foundation under grant no. C-1839, C-2024, and No. C-1411, the U.S. Department Of Energy (DOE) grant no. DE-SC0021421 and No. DE-SC0018197, and the Gordon and Betty Moore Foundation’s EPiQS Initiative through grant no. GBMF9470. The work at Nanyang Technological University was supported by the National Research Foundation, Singa- pore under its Fellowship Award (NRF-NRFF13-2021-0010). T.N. acknowledges support from the European Union’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). 2022-12-14T06:18:35Z 2022-12-14T06:18:35Z 2022 Journal Article Yin, J., Jiang, Y., Teng, X., Md. Shafayat Hossain, Mardanya, S., Chang, T., Ye, Z., Xu, G., Denner, M. M., Neupert, T., Lienhard, B., Deng, H., Setty, C., Qimiao Si, Chang, G., Guguchia, Z., Gao, B., Shumiya, N., Zhang, Q., ...M. Zahid Hasan (2022). Discovery of charge order and corresponding edge state in kagome magnet FeGe. Physical Review Letters, 129(16), 166401-. https://dx.doi.org/10.1103/PhysRevLett.129.166401 0031-9007 https://hdl.handle.net/10356/163569 10.1103/PhysRevLett.129.166401 16 129 166401 en NRF-NRFF13-2021-0010 Physical Review Letters © 2022 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society. application/pdf |