Study of Pressure effect on the anomalous Hall effect in the altermagnet MnTe

Altermagnets are considered an outstanding class of materials for their potential application in spin electronic (spintronic) devices, and they feature non-relativistic spin splitting with a vanishing net magnetic moment. Hexagonal MnTe is an altermagnet with compensated antiparallel magnetic order and was recently discovered to exhibit an anomalous Hall effect. Here, by applying pressure on the hexagonal MnTe, we investigate the pressure-induced evolution of its anomalous Hall effect and spin splitting. Our results provide greater insight regarding the relationship between the spontaneous time-reversal symmetry breaking and the band topology in hexagonal MnTe and toward realizing the application of altermagnets in spintronics under a room-temperature environment.