Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 20: Dynamics in many-body systems: Equilibration and localization II (joint session DY/TT)
TT 20.7: Vortrag
Montag, 1. April 2019, 17:15–17:30, H19
Light-induced Hall current in Graphene: beyond the high-frequency limit — •Marlon Nuske1 and Ludwig Mathey1,2,3 — 1Zentrum für optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany — 2Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany — 3The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
In the high-frequency limit driving graphene with circularly-polarized light leads to a quantized Hall effect. In experiment, however, this idealized theoretical limit is often not achievable. We therefore investigate the effects of a finite-frequency circularly-polarized pulse on the Hall conductivity of graphene. For such a setup it is crucial to include decay processes in the theoretical model. We analyze the additional resonant contributions to the Hall current that arise from finite frequency driving. We explore different regimes, where either the resonant or the effective high-frequency contributions dominate the Hall current.