Ultrafast currents in metals Our investigation of ultrafast currents as a function of the metallic volume fraction f in the 2D nanolaminates shows a clear trend: The higher is the fraction, the higher is J 0 , max (see Fig. 2A) .
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Ultrafast currents in metals Our investigation of ultrafast currents as a function of the metallic volume fraction f in the 2D nanolaminates shows a clear trend: The higher is the fraction, the higher is J 0 , max (see Fig. 2A) .