Giant, unconventional anomalous Hall effect in the metallic frustrated magnet 
candidate, KV3Sb5

Yang, Shuo-Ying; Wang, Yaojia; Ortiz, Brenden R.; Liu, Defa; Gayles, Jacob; Derunova, Elena; Gonzalez-Hernandez, Rafael; Smejkal, Libor; Chen, Yulin; Parkin, Stuart S. P.; Wilson, Stephen D.; Toberer, Eric S.; McQueen, Tyrel; Ali, Mazhar N.

doi:10.1126/sciadv.abb6003

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Giant, unconventional anomalous Hall effect in the metallic frustrated magnet candidate, KV₃Sb₅

MPS-Authors

Yang, Shuo-Ying
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;
International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Wang, Yaojia
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Liu, Defa
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Derunova, Elena
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Parkin, Stuart S. P.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Ali, Mazhar N.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1126/sciadv.abb6003
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Citation

Yang, S.-Y., Wang, Y., Ortiz, B. R., Liu, D., Gayles, J., Derunova, E., et al. (2020). Giant, unconventional anomalous Hall effect in the metallic frustrated magnet candidate, KV₃Sb₅. Science Advances, 6(31): eabb6003. doi:10.1126/sciadv.abb6003.

Cite as: https://hdl.handle.net/21.11116/0000-0008-D5CC-2

Abstract

The anomalous Hall effect (AHE) is one of the most fundamental phenomena in physics. In the highly conductive regime, ferromagnetic metals have been the focus of past research. Here, we report a giant extrinsic AHE in KV₃Sb₅, an exfoliable, highly conductive semimetal with Dirac quasiparticles and a vanadium Kagome net. Even without report of long range magnetic order, the anomalous Hall conductivity reaches 15,507 Ω^-1 cm^-1 with an anomalous Hall ratio of ≈ 1.8%; an order of magnitude larger than Fe. Defying theoretical expectations, KV₃Sb₅ shows enhanced skew scattering that scales quadratically, not linearly, with the longitudinal conductivity, possibly arising from the combination of highly conductive Dirac quasiparticles with a frustrated magnetic sublattice. This allows the possibility of reaching an anomalous Hall angle of 90° in metals. This observation raises fundamental questions about AHEs and opens new frontiers for AHE and spin Hall effect exploration, particularly in metallic frustrated magnets.