Ultrafast spin currents in iron-based heterostructures generate terahertz radiation bursts whose frequency can be tailored through structural engineering.
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Averitt, R. Getting current pulses under control. Nature Nanotech 8, 232–233 (2013). https://doi.org/10.1038/nnano.2013.51
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DOI: https://doi.org/10.1038/nnano.2013.51
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