Pressure-Enhanced Intrinsic Anomalous Hall Conductivity in the Kagome ferrimagnet TbMn₆Sn₆

The kagome ferrimagnet TbMn6Sn6, featuring a pristine Mn kagome lattice, emerges as a candidate Chern magnet with a large intrinsic anomalous Hall effect (AHE). While chemical substitution can modulate its properties, hydrostatic pressure provides a disorder-free route to manipulate electronic and magnetic interactions. Here, we investigate the effect of hydrostatic pressure on electrical- and magneto-transport in TbMn₆Sn₆ up to 18.3 GPa. Pressure significantly enhances hysteresis in the magnetoresistance and Hall responses, concurrent with a monotonic increase in coercive field, suggesting the enhancement of interlayer magnetic couplings in a robust c-axis ferrimagnetic order. The intrinsic anomalous Hall conductivity dramatically rises from 129.5 S·cm^-1 at ambient pressure to 448.7 S·cm^-1 at 14.0 GPa-a 247 % enhancement that is unprecedented among pressure-tuned kagome magnets. Bolstered with density functional theory calculations, we reveal that pressure induces multiple gap openings near the Fermi level, giving rise to pronounced Berry curvature hotspots that may contribute to the AHE. Our results establish pressure as a powerful tool for enhancing intrinsic topological responses in such kagome magnet.