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When graphene is exposed to a strong few-cycle optical field, a directionalelectric current can be induced depending on the carrier-envelope phase of thefield. This phenomenon has successfully been explained by the charge dynamicsin reciprocal space, namely an asymmetry in the conduction band population leftafter the laser excitation. However, the corresponding real-space perspectivehas not been explored so far although it could yield knowledge about the atomicorigin of the macroscopic currents. In this work, by adapting thenearest-neighbor tight-binding model including overlap integrals and thesemiconductor Bloch equation, we reveal the spatial distributions of thelight-field-driven currents on the atomic scale and show how they are relatedto the light-induced changes of charge densities. The atomic-scale currentsflow dominantly through the network of the {\pi} bonds and are the strongest atthe bonds parallel to the field polarization, where an increase of the chargedensity is observed. The real-space maps of the currents and changes in chargedensities are elucidated using simple symmetries connecting real and reciprocalspace. We also discuss the strong-field-driven Rabi oscillations appearing inthe atomic-scale charge densities. This work highlights the importance ofreal-space measurements and stimulates future time-resolved atomic-scaleexperimental studies with high-energy electrons or X-rays, for examples.

Atomic real-space perspective of light-field-driven currents in graphene