TY - JOUR
T1 - Anomalous Electrical Transport in the Kagome Magnet YbFe6Ge6
AU - Yao, Weiliang
AU - Liu, Supeng
AU - Kikuchi, Hodaka
AU - Ishikawa, Hajime
AU - Fjellvåg, Øystein S.
AU - Tam, David W.
AU - Ye, Feng
AU - Abernathy, Douglas L.
AU - Wood, George D.A.
AU - Adroja, Devashibhai
AU - Wu, Chun Ming
AU - Huang, Chien Lung
AU - Gao, Bin
AU - Xie, Yaofeng
AU - Gao, Yuxiang
AU - Rao, Karthik
AU - Morosan, Emilia
AU - Kindo, Koichi
AU - Masuda, Takatsugu
AU - Hashimoto, Kenichiro
AU - Shibauchi, Takasada
AU - Dai, Pengcheng
N1 - Publisher Copyright:
© 2025 American Physical Society.
PY - 2025/5/9
Y1 - 2025/5/9
N2 - Two-dimensional (2D) kagome metals offer a unique platform for exploring electron correlation phenomena derived from quantum many-body effects. Here, we report a combined study of electrical magnetotransport and neutron scattering on YbFe6Ge6, where the Fe moments in the 2D kagome layers exhibit an A-type collinear antiferromagnetic order below TN≈500 K. Interactions between the Fe ions in the layers and the localized Yb magnetic ions in between reorient the c-axis-aligned Fe moments to the kagome plane below TSR≈63 K. Our magnetotransport measurements show an intriguing anomalous Hall effect (AHE) that emerges in the spin-reorientated collinear state, accompanied by the closing of the spin anisotropy gap as revealed from inelastic neutron scattering. The gapless spin excitations and the Yb-Fe interaction are able to support a dynamic scalar spin chirality, which explains the observed AHE. Therefore, our Letter demonstrates that spin fluctuations may provide an additional scattering channel for the conduction electrons and give rise to AHE even in a collinear antiferromagnet.
AB - Two-dimensional (2D) kagome metals offer a unique platform for exploring electron correlation phenomena derived from quantum many-body effects. Here, we report a combined study of electrical magnetotransport and neutron scattering on YbFe6Ge6, where the Fe moments in the 2D kagome layers exhibit an A-type collinear antiferromagnetic order below TN≈500 K. Interactions between the Fe ions in the layers and the localized Yb magnetic ions in between reorient the c-axis-aligned Fe moments to the kagome plane below TSR≈63 K. Our magnetotransport measurements show an intriguing anomalous Hall effect (AHE) that emerges in the spin-reorientated collinear state, accompanied by the closing of the spin anisotropy gap as revealed from inelastic neutron scattering. The gapless spin excitations and the Yb-Fe interaction are able to support a dynamic scalar spin chirality, which explains the observed AHE. Therefore, our Letter demonstrates that spin fluctuations may provide an additional scattering channel for the conduction electrons and give rise to AHE even in a collinear antiferromagnet.
UR - http://www.scopus.com/inward/record.url?scp=105004412300&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.134.186501
DO - 10.1103/PhysRevLett.134.186501
M3 - Article
AN - SCOPUS:105004412300
SN - 0031-9007
VL - 134
JO - Physical Review Letters
JF - Physical Review Letters
IS - 18
M1 - 186501
ER -