Pressure-Tunable Large Anomalous Hall Effect in Ferromagnetic Metal LiMn₆Sn₆

Recently, giant intrinsic anomalous Hall effect (AHE) has been observed in the materials with kagome lattice. Here, we systematically investigate the influence of high pressure on the AHE in the ferromagnet LiMn 6 Sn 6 with clean Mn kagome lattice. Our in situ high-pressure Raman spectroscopy indicates that the crystal structure of LiMn 6 Sn 6 maintains a hexagonal phase under high pressures up to 8.51 GPa. The anomalous Hall conductivity (AHC) σ x y A remains around 150 Ω −1 ⋅cm −1 , dominated by the intrinsic mechanism. Combined with theoretical calculations, our results indicate that the stable AHE under pressure in LiMn 6 Sn 6 originates from the robust electronic and magnetic structure.