Spin-reorientation Driven Temperature Dependent Intrinsic Anomalous Hall Conductivity in Fe$_3$Ge, a Ferromagnetic Topological Metal
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908454079168512 |
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| author | Ghosh, Susanta Bhowmik, Tushar Kanti Low, Achintya Thirupathaiah, Setti |
| author_facet | Ghosh, Susanta Bhowmik, Tushar Kanti Low, Achintya Thirupathaiah, Setti |
| contents | We investigate the temperature dependence of the intrinsic anomalous Hall conductivity in Fe$_3$Ge, which is a ferromagnetic topological metal. We observe a significant anisotropy in the anomalous Hall conductivity between in-plane and out-of-plane directions. We further identify that the total Hall conductivity is contributed extrinsically due to the skew-scattering mechanism and intrinsically due to nonzero Berry curvature in the momentum space. Most importantly, we demonstrate the temperature dependence of the intrinsic Hall contribution, a rare phenomenon to visualize experimentally, due to tuning the easy-magnetic axis from the out-of-plane to the in-plane with decreasing temperature. We also show that the extrinsic Hall conductivity decreases with temperature as $σ_{xy}^{ext}(T)=\frac{σ_{xy0}^{ext}}{(aT+1)^2}$ due to electron-phonon scattering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_12777 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin-reorientation Driven Temperature Dependent Intrinsic Anomalous Hall Conductivity in Fe$_3$Ge, a Ferromagnetic Topological Metal Ghosh, Susanta Bhowmik, Tushar Kanti Low, Achintya Thirupathaiah, Setti Materials Science We investigate the temperature dependence of the intrinsic anomalous Hall conductivity in Fe$_3$Ge, which is a ferromagnetic topological metal. We observe a significant anisotropy in the anomalous Hall conductivity between in-plane and out-of-plane directions. We further identify that the total Hall conductivity is contributed extrinsically due to the skew-scattering mechanism and intrinsically due to nonzero Berry curvature in the momentum space. Most importantly, we demonstrate the temperature dependence of the intrinsic Hall contribution, a rare phenomenon to visualize experimentally, due to tuning the easy-magnetic axis from the out-of-plane to the in-plane with decreasing temperature. We also show that the extrinsic Hall conductivity decreases with temperature as $σ_{xy}^{ext}(T)=\frac{σ_{xy0}^{ext}}{(aT+1)^2}$ due to electron-phonon scattering. |
| title | Spin-reorientation Driven Temperature Dependent Intrinsic Anomalous Hall Conductivity in Fe$_3$Ge, a Ferromagnetic Topological Metal |
| topic | Materials Science |
| url | https://arxiv.org/abs/2507.12777 |