Robust anomalous Hall effect in ferromagnetic metal under high pressure

TL;DR

This study demonstrates that the anomalous Hall effect in ferromagnetic LiMn6Sn6 remains stable under high pressure, due to its robust electronic and magnetic structure, confirmed by experiments and theoretical calculations.

Contribution

It provides the first systematic investigation of high-pressure effects on AHE in LiMn6Sn6, showing the stability of AHE up to 8.51 GPa.

Findings

Anomalous Hall conductivity remains around 150 Ω^-1 cm^-1 under pressure.

Crystal structure remains hexagonal up to 8.51 GPa.

AHE is dominated by intrinsic mechanisms, stable under high pressure.

Abstract

Recently, the giant intrinsic anomalous Hall effect (AHE) has been observed in the materials with kagome lattice. In this study, we systematically investigate the influence of high pressure on the AHE in the ferromagnet LiMn6Sn6 with clean Mn kagome lattice. Our in-situ high-pressure Raman spectroscopy indicates that the crystal structure of LiMn6Sn6 maintains a hexagonal phase under high pressures up to 8.51 GPa. The anomalous Hall conductivity (AHC) {\sigma}xyA remains around 150 {\Omega}-1 cm-1, dominated by the intrinsic mechanism. Combined with theoretical calculations, our results indicate that the stable AHE under pressure in LiMn6Sn6 originates from the robust electronic and magnetic structure.