It is well known that the intrinsic anomalous Hall effect (AHE) arises from the integration of the nonzero Berry curvature (BC), conventionally observed in Dirac/Weyl and nodal line semimetals. Moreover, nodal surface semimetals are expected to exhibit more significant BC under the prevalence of degenerate points near the Fermi level. In this work, we report the detection of a giant AHE in the kagome magnet ${\mathrm{Fe}}_3\mathrm{Ge}$ with a two-dimensional nodal surface at the $k_z=\pi$ plane, exhibiting an anomalous Hall conductivity (AHC) of 1500 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^{-1}$ at 160 K, which exceeds that of many typical kagome topological materials. This finding suggests another platform for searching large AHC materials and facilitates potential room-temperature applications in spintronic devices and quantum computing.

Close

PrevNext

View figure in article

• First-principles calculations
• Hall effect
• Symmetry protected topological states
• Thermoelectric effects
• Topological materials