Abstract
An important issue for spintronic terahertz emitters is the analysis of spin-current generation and spin-to-charge conversion based on the emitted terahertz signal. This study shows that for such analysis it is mandatory to understand and account for local charging phenomena, which occur due to the limited area in which ultrafast currents are generated. Charge backflow strongly modifies the ensuing charge-current profile. This result is crucial for correctly interpreting the profile of the emitted terahertz pulse.
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