Weyl Fermion with various chiralities in a f-electron ferromagnetic system: PrB4
| Autor: | Ryu, Dong-Choon, Kim, Junwon, Kim, Kyoo, Kim, Bongjae, Kang, Chang-Jong, Min, B. I. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Physical Review B 110, 075156 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.110.075156 |
| Popis: | 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 ($\Omega \cdot$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. Comment: 7 pages, 6 figures |
| Databáze: | arXiv |
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