Breakdown of the scaling relation of anomalous Hall effect in Kondo lattice ferromagnet USbTe

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2023-02-01
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Siddiquee, Hasan
Broyles, Christopher
Kotta, Erica
Liu, Shouzheng
Peng, Shiyu
Kong, Tai
Kang, Byungkyun
Zhu, Qiang
Lee, Yongbin
Ke, Liqin
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Iowa State University Digital Repository, Ames IA (United States)
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Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

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Abstract
The interaction between strong correlation and Berry curvature is an open territory of in the field of quantum materials. Here we report large anomalous Hall conductivity in a Kondo lattice ferromagnet USbTe which is dominated by intrinsic Berry curvature at low temperatures. However, the Berry curvature induced anomalous Hall effect does not follow the scaling relation derived from Fermi liquid theory. The onset of the Berry curvature contribution coincides with the Kondo coherent temperature. Combined with ARPES measurement and DMFT calculations, this strongly indicates that Berry curvature is hosted by the flat bands induced by Kondo hybridization at the Fermi level. Our results demonstrate that the Kondo coherence of the flat bands has a dramatic influence on the low temperature physical properties associated with the Berry curvature, calling for new theories of scaling relations of anomalous Hall effect to account for the interaction between strong correlation and Berry curvature.
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This article is published as Siddiquee, Hasan, Christopher Broyles, Erica Kotta, Shouzheng Liu, Shiyu Peng, Tai Kong, Byungkyun Kang et al. "Breakdown of the scaling relation of anomalous Hall effect in Kondo lattice ferromagnet USbTe." Nature Communications 14, no. 1 (2023): 527. DOI: 10.1038/s41467-023-36221-9. Copyright 2023 The Author(s). Attribution 4.0 International (CC BY 4.0). Posted with permission. DOE Contract Number(s): AC02-07CH11358; AC02-05CH11231; SC0021970; DMR-2105081; 11925408; 11921004; 12188101; 2018YFA0305700; XDB33000000; CAS-WX2021SF-0102
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