Giant anomalous Hall effect in the kagome nodal surface semimetal Fe 3 Ge

作者：Shuxiang Li, Wencheng Wang, Sheng Xu, Tianhao Li, Zheng Li, Jinjin Wang, Junjian Mi, Tao Qian, Feng Tang, Xiangang Wan, Zhu‐An Xu · 发表于：Physical review. B./Physical review. B · 年份：2025 · DOI：10.1103/f9rs-dswt · 被引用次数：3 · 研究领域：Topological Materials and Phenomena、Graphene research and applications、Chemical and Physical Properties of Materials

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 ${k}_{z}=\ensuremath{\pi}$ plane, exhibiting an anomalous Hall conductivity (AHC) of 1500 ${\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ 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.