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Nonlinear spin control by terahertz-driven anisotropy fields

Baierl, S. ; Hohenleutner, M. ; Kampfrath, T. ; Zvezdin, A. K. ; Kimel, A. V. ; Huber, R. ; Mikhaylovskiy, R. V.


Future information technologies, such as ultrafast data recording, quantum computation or spintronics, call for ever faster spin control by light(1-16). Intense terahertz pulses can couple to spins on the intrinsic energy scale of magnetic excitations(5,11). Here, we explore a novel electric dipole-mediated mechanism of nonlinear terahertz-spin coupling that is much stronger than linear Zeeman ...


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