Large anomalous Hall conductivity in Weyl ferrimagnet Cs$_{2}$Co$_{3}$S$_4$ predicted by density-functional calculations
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866908365894975488 |
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| author | Acharya, Gang Bahadur Richter, Manuel Koepernik, Klaus Ghimire, Madhav Prasad |
| author_facet | Acharya, Gang Bahadur Richter, Manuel Koepernik, Klaus Ghimire, Madhav Prasad |
| contents | The identification of topological Weyl semimetals has recently gained considerable attention. Here, we report the results of density-functional theory calculations regarding the magnetic properties, the electronic structure, and the intrinsic anomalous Hall conductivity of the title compound, which was synthesized already 50 years ago but received little attention, hitherto. We found Cs$_{2}$Co$_{3}$S$_4$ to be a ferrimagnetic half-metal with a total spin magnetic moment of about 3 $μ_B$ per formula unit. It shows energy band gap of 0.36 eV in the majority-spin channel and a pseudo-gap at the Fermi level in the minority-spin channel. We identified several sets of low-energy Weyl points and traced their dependence on the direction of magnetization. The intrinsic anomalous Hall conductivity is predicted to reach a magnitude up to 500 $Ω^{-1}$cm$^{-1}$, which is comparable to values obtained in other celebrated Weyl semimetals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_08077 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Large anomalous Hall conductivity in Weyl ferrimagnet Cs$_{2}$Co$_{3}$S$_4$ predicted by density-functional calculations Acharya, Gang Bahadur Richter, Manuel Koepernik, Klaus Ghimire, Madhav Prasad Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons The identification of topological Weyl semimetals has recently gained considerable attention. Here, we report the results of density-functional theory calculations regarding the magnetic properties, the electronic structure, and the intrinsic anomalous Hall conductivity of the title compound, which was synthesized already 50 years ago but received little attention, hitherto. We found Cs$_{2}$Co$_{3}$S$_4$ to be a ferrimagnetic half-metal with a total spin magnetic moment of about 3 $μ_B$ per formula unit. It shows energy band gap of 0.36 eV in the majority-spin channel and a pseudo-gap at the Fermi level in the minority-spin channel. We identified several sets of low-energy Weyl points and traced their dependence on the direction of magnetization. The intrinsic anomalous Hall conductivity is predicted to reach a magnitude up to 500 $Ω^{-1}$cm$^{-1}$, which is comparable to values obtained in other celebrated Weyl semimetals. |
| title | Large anomalous Hall conductivity in Weyl ferrimagnet Cs$_{2}$Co$_{3}$S$_4$ predicted by density-functional calculations |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2407.08077 |