Ultrafast control of Berry-curvature-driven transport via spin-torque excitation of chiral magnets (B10*)

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In this project, we will use optical techniques to study spin dynamics in Mn3Ir and Mn3Sn. By exciting the expected magnon modes, we will accelerate the seeded spin-orbit torque magnetization reversal of these noncollinear antiferromagnets to ultrafast timescales. To achieve this goal, we will employ on-chip spintronic emitters to inject THz-frequency current pulses. The resulting switching of chiral spin texture will be detected through time-resolved measurements of Berry-curvature-driven anomalous Hall effect using photo-conductive sampling. The development of these novel device geometries will be tested using the ferrimagnetic materials GdFe and DyCo5.