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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.04616 |
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| _version_ | 1866915231178948608 |
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| author | Sha, Xuyang Zhang, Xuejin Liu, Hao Cao, Jin Chen, Ruohan Zhai, Jinfeng Shao, Dingfu Wu, Shiwei Xiao, Cong Yang, Shengyuan A. He, Pan Guo, Hangwen Shen, Jian |
| author_facet | Sha, Xuyang Zhang, Xuejin Liu, Hao Cao, Jin Chen, Ruohan Zhai, Jinfeng Shao, Dingfu Wu, Shiwei Xiao, Cong Yang, Shengyuan A. He, Pan Guo, Hangwen Shen, Jian |
| contents | While the time-reversal-even (T-even) nonlinear Hall effect has been extensively discussed in nonmagnetic materials, the impact of magnetic phase transition on it remains largely overlooked. Here, we report an abrupt enhancement of the T-even nonlinear Hall effect in non-centrosymmetric SrRuO3(111) thin films during the paramagnetic-ferromagnetic transition. Scaling analysis reveals a sign reversal of both the skew scattering and side jump contributions upon the emergence of magnetism, which we attribute to the sign change of Berry curvature triple on the Fermi surface. Density functional theory calculations support this interpretation, ascribing this behavior to distinctive origins of Berry curvature hot spots in paramagnetic and ferromagnetic phases. Our findings unveil the exchange-induced dramatic nonperturbative change of nonlinear Hall effect, and establish SrRuO3(111) thin films as a promising platform for exploring magnetically tunable nonlinear transport effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_04616 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Sign reversal of Berry curvature triple driven by magnetic phase transition in a ferromagnetic polar metal Sha, Xuyang Zhang, Xuejin Liu, Hao Cao, Jin Chen, Ruohan Zhai, Jinfeng Shao, Dingfu Wu, Shiwei Xiao, Cong Yang, Shengyuan A. He, Pan Guo, Hangwen Shen, Jian Materials Science While the time-reversal-even (T-even) nonlinear Hall effect has been extensively discussed in nonmagnetic materials, the impact of magnetic phase transition on it remains largely overlooked. Here, we report an abrupt enhancement of the T-even nonlinear Hall effect in non-centrosymmetric SrRuO3(111) thin films during the paramagnetic-ferromagnetic transition. Scaling analysis reveals a sign reversal of both the skew scattering and side jump contributions upon the emergence of magnetism, which we attribute to the sign change of Berry curvature triple on the Fermi surface. Density functional theory calculations support this interpretation, ascribing this behavior to distinctive origins of Berry curvature hot spots in paramagnetic and ferromagnetic phases. Our findings unveil the exchange-induced dramatic nonperturbative change of nonlinear Hall effect, and establish SrRuO3(111) thin films as a promising platform for exploring magnetically tunable nonlinear transport effects. |
| title | Sign reversal of Berry curvature triple driven by magnetic phase transition in a ferromagnetic polar metal |
| topic | Materials Science |
| url | https://arxiv.org/abs/2503.04616 |