Probing the anomalous symmetry-breaking in kagome material CsV3Sb5 via third-order nonlinearity
Abstract
The kagome material has rapidly established itself as a research frontier in condensed matter physics, owing to its distinctive geometric structure and the rich array of unconventional physical phenomena. In the kagome AV3Sb5 (A = K, Rb, Cs) family, the charge-ordered state exhibits a remarkable characteristic, i.e., anomalous symmetry-breaking, which is tied to the topological nature of the electronic band structure. Here, we report the third-order nonlinear longitudinal and Hall responses that persist stably up to room temperature in the kagome material CsV3Sb5. Notably, the nonlinear responses demonstrate significant enhancement below the charge density wave (~ 77 K) order and anomalous symmetry-breaking (~ 39 K) state. The scaling analysis indicates that the third-order nonlinear transport is governed jointly by quantum geometric contribution and extrinsic scattering. This study realizes a giant third-order nonlinear response and provides a distinct method to detect anomalous symmetry-breaking in CsV3Sb5.
Versions
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BibTeX
@misc{dai2026probing,
title = {{Probing the anomalous symmetry-breaking in kagome material CsV3Sb5 via third-order nonlinearity}},
author = {Zheng Dai and Fengyi Guo and Shuai Zhang and Xiubing Li and Congcong Li and Yufan Ju and Ziqi Wang and Bin Cheng and Zhe Ying and Fengqi Song},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.13656},
eprint = {2609.13656},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.13656},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Probing the anomalous symmetry-breaking in kagome material CsV3Sb5 via third-order nonlinearity
AU - Zheng Dai
AU - Fengyi Guo
AU - Shuai Zhang
AU - Xiubing Li
AU - Congcong Li
AU - Yufan Ju
AU - Ziqi Wang
AU - Bin Cheng
AU - Zhe Ying
AU - Fengqi Song
PY - 2026
DA - 2026/09/12
PB - arXiv
DO - 10.48550/arxiv.2609.13656
UR - https://arxiv.org/abs/2609.13656
AB - The kagome material has rapidly established itself as a research frontier in condensed matter physics, owing to its distinctive geometric structure and the rich array of unconventional physical phenomena. In the kagome AV3Sb5 (A = K, Rb, Cs) family, the charge-ordered state exhibits a remarkable characteristic, i.e., anomalous symmetry-breaking, which is tied to the topological nature of the electronic band structure. Here, we report the third-order nonlinear longitudinal and Hall responses that persist stably up to room temperature in the kagome material CsV3Sb5. Notably, the nonlinear responses demonstrate significant enhancement below the charge density wave (~ 77 K) order and anomalous symmetry-breaking (~ 39 K) state. The scaling analysis indicates that the third-order nonlinear transport is governed jointly by quantum geometric contribution and extrinsic scattering. This study realizes a giant third-order nonlinear response and provides a distinct method to detect anomalous symmetry-breaking in CsV3Sb5.
ER -