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Probing the Anomalous Symmetry Breaking in Kagome Material CsV₃Sb₅ via Third-Order Nonlinearity Zheng Dai (795037) Fengyi Guo (5068571) Shuai Zhang (115662) Xiubing Li (25147096) Congcong Li (710856) Yufan Ju (25147099) Ziqi Wang (1525060) Bin Cheng (64483) Zhe Ying (193225) Fengqi Song (1535047) Biophysics Biochemistry Physical Sciences not elsewhere classified Medicine Biotechnology Evolutionary Biology Astronomical and Space Sciences not elsewhere classified Developmental Biology Inorganic Chemistry Plant Biology Virology Computational Biology unconventional physical phenomena scaling analysis indicates quantum geometric contribution electronic band structure distinctive geometric structure condensed matter physics order nonlinear transport order nonlinear longitudinal ordered state exhibits anomalous symmetry breaking 5 </ sub 3 </ sub kagome material csv kagome material anomalous symmetry kagome av order nonlinearity topological nature study advances room temperature rich array research frontier remarkable characteristic rapidly established persist stably hall responses governed jointly extrinsic scattering distinct method 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, and 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 transition 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 the quantum geometric contribution and extrinsic scattering. This study advances the understanding of the third-order nonlinear transport and provides a distinct method to detect anomalous symmetry breaking in CsV₃Sb₅. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/acs.nanolett.6c02890.s001 https://figshare.com/articles/journal_contribution/Probing_the_Anomalous_Symmetry_Breaking_in_Kagome_Material_CsV_sub_3_sub_Sb_sub_5_sub_via_Third-Order_Nonlinearity/34037278 CC BY-NC 4.0