Weyl Fermion with various chiralities in a f-electron ferromagnetic system: PrB4
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866914940187574272 |
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| author | Ryu, Dong-Choon Kim, Junwon Kim, Kyoo Kim, Bongjae Kang, Chang-Jong Min, B. I. |
| author_facet | Ryu, Dong-Choon Kim, Junwon Kim, Kyoo Kim, Bongjae Kang, Chang-Jong Min, B. I. |
| contents | Rare-earth tetraborides ($R$B$_{4}$) have attracted a lot of recent attention due to their intriguing electronic, magnetic, and topological properties. We have theoretically investigated topological properties of PrB$_{4}$, which is unique among $R$B$_{4}$ family due to its ferromagnetic ground state. We have discovered that PrB$_{4}$ is an intrinsic magnetic Weyl system possessing multiple topological band crossings with various chiral charges. Density-functional-theory band calculations combined with tight-binding band analysis reveal large Fermi-arc surface states, which are characteristic fingerprints of Weyl fermions. Anomalous Hall conductivity is estimated to be very large, ranging from 500 to 1000 ($Ω\cdot$cm)$^{-1}$ near the Fermi level, which also demonstrates the topological Weyl character of ferromagnetic PrB$_{4}$. These findings suggest that PrB$_{4}$, being a potential candidate of magnetic Weyl system, would be a promising rare-earth topological system for applications to next-generation spintronic and photonic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_03958 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Weyl Fermion with various chiralities in a f-electron ferromagnetic system: PrB4 Ryu, Dong-Choon Kim, Junwon Kim, Kyoo Kim, Bongjae Kang, Chang-Jong Min, B. I. Strongly Correlated Electrons Rare-earth tetraborides ($R$B$_{4}$) have attracted a lot of recent attention due to their intriguing electronic, magnetic, and topological properties. We have theoretically investigated topological properties of PrB$_{4}$, which is unique among $R$B$_{4}$ family due to its ferromagnetic ground state. We have discovered that PrB$_{4}$ is an intrinsic magnetic Weyl system possessing multiple topological band crossings with various chiral charges. Density-functional-theory band calculations combined with tight-binding band analysis reveal large Fermi-arc surface states, which are characteristic fingerprints of Weyl fermions. Anomalous Hall conductivity is estimated to be very large, ranging from 500 to 1000 ($Ω\cdot$cm)$^{-1}$ near the Fermi level, which also demonstrates the topological Weyl character of ferromagnetic PrB$_{4}$. These findings suggest that PrB$_{4}$, being a potential candidate of magnetic Weyl system, would be a promising rare-earth topological system for applications to next-generation spintronic and photonic devices. |
| title | Weyl Fermion with various chiralities in a f-electron ferromagnetic system: PrB4 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.03958 |