Beyond Germanides: Anomalous Hall Effect in the Silicide LaMn2Si2

By combining symmetry analysis and direct density functional calculations including the spin–orbit coupling, we demonstrate that anomalous Hall effect can be observed in not only germanides with general formula RMn 2 Ge 2 , where R is a rare-earth ion or Y. Our calculations predict a large anomalous Hall conductivity in LaMn 2 Si 2 , with a nonzero $$\sigma _{{xy}}^{{{\text{AH}}}}$$ component of –360 S/cm, accompanied by a pronounced magneto-optical response. Remarkably, electron doping of LaMn 2 Si 2 is expected to substantially enhance the Hall conductivity, with values reaching up to –650 S/cm. These results suggest that silicides with general formula RM 2 Si 2 can be an interesting platform for studying anomalous Hall effect.