Anisotropic transport properties and topological Hall effect in the annealed kagome antiferromagnet FeGe
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866912199076741120 |
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| author | Ma, Jiajun Shi, Chenfei Cao, Yantao Zhang, YuWei Li, Yazhou Liao, Jiaxing Wang, Jialu Jiao, Wenhe Guo, Hanjie Xu, Chenchao Cao, Shixun Dai, Jianhui Bao, Jin-Ke Li, Yuke |
| author_facet | Ma, Jiajun Shi, Chenfei Cao, Yantao Zhang, YuWei Li, Yazhou Liao, Jiaxing Wang, Jialu Jiao, Wenhe Guo, Hanjie Xu, Chenchao Cao, Shixun Dai, Jianhui Bao, Jin-Ke Li, Yuke |
| contents | Electron correlation often gives birth to various orders in quantum materials. Recently, a strongly correlated kagome antiferromagnet FeGe is discovered to undergo a charge density wave transition inside the A-type antiferromagnetic state, providing an opportunity to explore the interplay between charge order and magnetism. Here, we reported the observation of anisotropic resistivity and Hall effect, along with a topological Hall effect, in the annealed FeGe crystals. As the current flows along the \emph{ab}-plane, the temperature dependence of $ρ_{ab}$ exhibits a distinct resistivity loop related to a first-order transition at $T_{cdw}$. The applied magnetic fields do not alter $T_{cdw}$ but can induce a spin-flop transition at $H_{sf}$. Consequently, a field-induced large topological Hall effect is observed in the canting antiferromagnetic (CAFM) state below $T_{cant}$, which is possibly attributed to the non-trivial spin texture during the spin-flop process. Whereas, as current is parallel to \emph{c}-axis, both the field-induced transitions in $ρ_{c}$ and $χ_{c}$ disappear. Instead, the Hall resistivity in the annealed FeGe significantly exhibits a deviation from the linear field-dependent. These findings provide valuable insight into revealing the interplay among magnetism, charge order and topology in the kagome magnets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_18824 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Anisotropic transport properties and topological Hall effect in the annealed kagome antiferromagnet FeGe Ma, Jiajun Shi, Chenfei Cao, Yantao Zhang, YuWei Li, Yazhou Liao, Jiaxing Wang, Jialu Jiao, Wenhe Guo, Hanjie Xu, Chenchao Cao, Shixun Dai, Jianhui Bao, Jin-Ke Li, Yuke Strongly Correlated Electrons Electron correlation often gives birth to various orders in quantum materials. Recently, a strongly correlated kagome antiferromagnet FeGe is discovered to undergo a charge density wave transition inside the A-type antiferromagnetic state, providing an opportunity to explore the interplay between charge order and magnetism. Here, we reported the observation of anisotropic resistivity and Hall effect, along with a topological Hall effect, in the annealed FeGe crystals. As the current flows along the \emph{ab}-plane, the temperature dependence of $ρ_{ab}$ exhibits a distinct resistivity loop related to a first-order transition at $T_{cdw}$. The applied magnetic fields do not alter $T_{cdw}$ but can induce a spin-flop transition at $H_{sf}$. Consequently, a field-induced large topological Hall effect is observed in the canting antiferromagnetic (CAFM) state below $T_{cant}$, which is possibly attributed to the non-trivial spin texture during the spin-flop process. Whereas, as current is parallel to \emph{c}-axis, both the field-induced transitions in $ρ_{c}$ and $χ_{c}$ disappear. Instead, the Hall resistivity in the annealed FeGe significantly exhibits a deviation from the linear field-dependent. These findings provide valuable insight into revealing the interplay among magnetism, charge order and topology in the kagome magnets. |
| title | Anisotropic transport properties and topological Hall effect in the annealed kagome antiferromagnet FeGe |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2412.18824 |