Symmetry analysis and density functional calculations reveal significant altermagnetism and anomalous Hall effect in LaMn2Si2, suggesting new avenues for study.
By combining symmetry analysis and direct density functional calculations including the spin-orbit coupling, we demonstrate that LaMn2Si2 is an M-type altermagnet. Our results predict a large anomalous Hall effect, with a non-zero xy component of -360 S/cm, accompanied by a pronounced magneto-optical response. Remarkably, electron doping of LaMn2Si2 is predicted to substantially enhance the Hall conductivity, with values reaching up to -650 S/cm. These results suggest that silicates with general formula RM2Si2 can be an interesting platform for studying both altermagnetism and anomalous Hall effect.
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Streltsov et al. (2025) studied this question.
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