Large anomalous Hall effect in single crystals of the kagome Weyl ferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Fe</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>Sn</mml:mi></mml:mrow></mml:math>
Bishnu Prasad Belbase, Linda Ye, Bishnu Karki, Jorge I. Facio, Jhih-Shih You, J. G. Checkelsky, Jeroen van den Brink, Madhav Prasad Ghimire
Abstract
The material class of kagome metals has rapidly grown and has been established as a field to explore the interplay between electronic topology and magnetism. In this work, we report a combined theoretical and experimental study of the anomalous Hall effect of the ferromagnetic kagome metal ${\mathrm{Fe}}_{3}\mathrm{Sn}$. The compound orders magnetically at 725 K and presents an easy-plane anisotropy. Hall measurements in single crystals below room temperature yield an anomalous Hall conductivity ${\ensuremath{\sigma}}_{xy}\ensuremath{\sim}500\phantom{\rule{4pt}{0ex}}{(\mathrm{\ensuremath{\Omega}}\phantom{\rule{0.16em}{0ex}}\text{cm})}^{\ensuremath{-}1}$, which is found to depend weakly on temperature. This value is in good agreement with the band-intrinsic contribution obtained by density-functional calculations. Our calculations also yield the correct magnetic anisotropy energy and predict the existence of Weyl nodes near the Fermi energy.