Giant Anomalous Hall and Nernst Effects in a Heavy Fermion Ferromagnet
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913216713457664 |
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| author | Li, Longfei Guan, Shuyue Chi, Shengwei Li, Jiawei Lin, Xinxuan Xu, Gang Jia, Shuang |
| author_facet | Li, Longfei Guan, Shuyue Chi, Shengwei Li, Jiawei Lin, Xinxuan Xu, Gang Jia, Shuang |
| contents | The anomalous Hall and Nernst effects describe the voltage drop perpendicular to an applied current and temperature gradient due to the magnetization of a magnetic material. These effects can be utilized to measure the Berry curvature at the Fermi energy, and have potential applications in future electronic devices and thermoelectric energy conversion. In this paper, we report giant anomalous Hall conductivity and anomalous Nernst coefficient, as high as about 1000 $Ω^{-1}$ cm$^{-1}$ and 10 $μ$V K$^{-1}$, respectively, in a heavy fermion ferromagnet, CeCrGe$_3$. This compound uniquely manifests strong hybridization between the 4$f$ and conduction electrons, leading to a Kondo lattice state in the presence of ferromagnetic order. Unlike conventional topological semimetals in which the electron correlation is weak, CeCrGe$_3$ manifests a strong Berry curvature field of the heavy fermion with an extremely low Fermi energy. Our findings pave the way for exploring correlation-driven topological responses in a ferromagnetic Kondo lattice environment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17624 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Giant Anomalous Hall and Nernst Effects in a Heavy Fermion Ferromagnet Li, Longfei Guan, Shuyue Chi, Shengwei Li, Jiawei Lin, Xinxuan Xu, Gang Jia, Shuang Strongly Correlated Electrons The anomalous Hall and Nernst effects describe the voltage drop perpendicular to an applied current and temperature gradient due to the magnetization of a magnetic material. These effects can be utilized to measure the Berry curvature at the Fermi energy, and have potential applications in future electronic devices and thermoelectric energy conversion. In this paper, we report giant anomalous Hall conductivity and anomalous Nernst coefficient, as high as about 1000 $Ω^{-1}$ cm$^{-1}$ and 10 $μ$V K$^{-1}$, respectively, in a heavy fermion ferromagnet, CeCrGe$_3$. This compound uniquely manifests strong hybridization between the 4$f$ and conduction electrons, leading to a Kondo lattice state in the presence of ferromagnetic order. Unlike conventional topological semimetals in which the electron correlation is weak, CeCrGe$_3$ manifests a strong Berry curvature field of the heavy fermion with an extremely low Fermi energy. Our findings pave the way for exploring correlation-driven topological responses in a ferromagnetic Kondo lattice environment. |
| title | Giant Anomalous Hall and Nernst Effects in a Heavy Fermion Ferromagnet |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2401.17624 |