Designing giant Hall response in layered topological semimetals

Autor: Grigorii Skorupskii, Fabio Orlandi, Iñigo Robredo, Milena Jovanovic, Rinsuke Yamada, Fatmagül Katmer, Maia G. Vergniory, Pascal Manuel, Max Hirschberger, Leslie M. Schoop
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Nature Communications, Vol 15, Iss 1, Pp 1-11 (2024)
Druh dokumentu: article
ISSN: 2041-1723
DOI: 10.1038/s41467-024-54203-3
Popis: Abstract Noncoplanar magnets are excellent candidates for spintronics. However, such materials are difficult to find, and even more so to intentionally design. Here, we report a chemical design strategy that allows us to find a series of noncoplanar magnets—Ln3Sn7 (Ln = Dy, Tb)—by targeting layered materials that have decoupled magnetic sublattices with dissimilar single-ion anisotropies and combining those with a square-net topological semimetal sublattice. Ln3Sn7 shows high carrier mobilities upwards of 17,000 cm2 ⋅ V−1 ⋅ s−1, and hosts noncoplanar magnetic order. This results in a giant Hall response with an anomalous Hall angle of 0.17 and Hall conductivity of over 42,000 Ω −1 ⋅ cm−1—a value over an order of magnitude larger than the established benchmarks in Co3Sn2S2 and Fe thin films.
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