Anomalous Electrical Transport in the Kagome Magnet YbFe$_6$Ge$_6$
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| Format: | Preprint |
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2025
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| _version_ | 1866909027437379584 |
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| author | Yao, Weiliang Liu, Supeng Kikuchi, Hodaka Ishikawa, Hajime Fjellvåg, Øystein S. Tam, David W. Ye, Feng Abernathy, Douglas L. Wood, George D. A. Adroja, Devashibhai Wu, Chun-Ming Huang, Chien-Lung Gao, Bin Xie, Yaofeng Gao, Yuxiang Rao, Karthik Morosan, Emilia Kindo, Koichi Masuda, Takatsugu Hashimoto, Kenichiro Shibauchi, Takasada Dai, Pengcheng |
| author_facet | Yao, Weiliang Liu, Supeng Kikuchi, Hodaka Ishikawa, Hajime Fjellvåg, Øystein S. Tam, David W. Ye, Feng Abernathy, Douglas L. Wood, George D. A. Adroja, Devashibhai Wu, Chun-Ming Huang, Chien-Lung Gao, Bin Xie, Yaofeng Gao, Yuxiang Rao, Karthik Morosan, Emilia Kindo, Koichi Masuda, Takatsugu Hashimoto, Kenichiro Shibauchi, Takasada Dai, Pengcheng |
| contents | Two-dimensional (2D) kagome metals offer a unique platform for exploring electron correlation phenomena derived from quantum many-body effects. Here, we report a combined study of electrical magnetotransport and neutron scattering on YbFe$_6$Ge$_6$, where the Fe moments in the 2D kagome layers exhibit an $A$-type collinear antiferromagnetic order below $T_{\rm{N}} \approx 500$ K. Interactions between the Fe ions in the layers and the localized Yb magnetic ions in between reorient the $c$-axis aligned Fe moments to the kagome plane below $T_{\rm{SR}} \approx 63$ K. Our magnetotransport measurements show an intriguing anomalous Hall effect (AHE) that emerges in the spin-reorientated collinear state, accompanied by the closing of the spin anisotropy gap as revealed from inelastic neutron scattering. The gapless spin excitations and the Yb-Fe interaction are able to support a dynamic scalar spin chirality, which explains the observed AHE. Therefore, our study demonstrates spin fluctuations may provide an additional scattering channel for the conduction electrons and give rise to AHE even in a collinear antiferromagnet. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_12454 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Anomalous Electrical Transport in the Kagome Magnet YbFe$_6$Ge$_6$ Yao, Weiliang Liu, Supeng Kikuchi, Hodaka Ishikawa, Hajime Fjellvåg, Øystein S. Tam, David W. Ye, Feng Abernathy, Douglas L. Wood, George D. A. Adroja, Devashibhai Wu, Chun-Ming Huang, Chien-Lung Gao, Bin Xie, Yaofeng Gao, Yuxiang Rao, Karthik Morosan, Emilia Kindo, Koichi Masuda, Takatsugu Hashimoto, Kenichiro Shibauchi, Takasada Dai, Pengcheng Strongly Correlated Electrons Materials Science Two-dimensional (2D) kagome metals offer a unique platform for exploring electron correlation phenomena derived from quantum many-body effects. Here, we report a combined study of electrical magnetotransport and neutron scattering on YbFe$_6$Ge$_6$, where the Fe moments in the 2D kagome layers exhibit an $A$-type collinear antiferromagnetic order below $T_{\rm{N}} \approx 500$ K. Interactions between the Fe ions in the layers and the localized Yb magnetic ions in between reorient the $c$-axis aligned Fe moments to the kagome plane below $T_{\rm{SR}} \approx 63$ K. Our magnetotransport measurements show an intriguing anomalous Hall effect (AHE) that emerges in the spin-reorientated collinear state, accompanied by the closing of the spin anisotropy gap as revealed from inelastic neutron scattering. The gapless spin excitations and the Yb-Fe interaction are able to support a dynamic scalar spin chirality, which explains the observed AHE. Therefore, our study demonstrates spin fluctuations may provide an additional scattering channel for the conduction electrons and give rise to AHE even in a collinear antiferromagnet. |
| title | Anomalous Electrical Transport in the Kagome Magnet YbFe$_6$Ge$_6$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2504.12454 |