Neel spin-orbit torque (NSOT) is a novel tool for spin manipulation in antiferromagnets with special symmetry (CuMnAs, Mn₂Au). As shown experimentally, application of current through such materials can lead to switching of the Neel vector. With clear opportunity of high-speed control of antiferromagnetic ordering, there were yet no investigations of NSOT time-dynamics in the terahertz range.
This talk will present our recent results in measuring ultrafast spin dynamics in Mn₂Au following application of free-space terahertz pulses. The data indicates that the THz-induced NSOT acts on Mn₂Au spins and launches an 0.6 THz antiferromagnetic resonance mode.

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https://us02web.zoom.us/j/82019921016
Meeting ID: 820 1992 1016