Dresden 2020 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 10: Graphene (jointly with DY, MA, HL, DS, O) (joint session TT/DY/HL)

DY 10.11: Talk

Monday, March 16, 2020, 17:45–18:00, HSZ 201

Geometric-dissipative origin of the light-induced Hall current in graphene I — •Marlon Nuske^1,3, Lukas Broers¹, and Ludwig Mathey^1,2,3 — ¹Zentrum für optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany — ²Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany — ³CUI: Advanced Imaging of Matter, 22761 Hamburg, Germany

We determine the origin of the light-induced Hall current in graphene recently reported by J. McIver, et al., Nature Physics (2019). The Hall current derives from the total Berry curvature of the occupied states of the light-induced Floquet bands, in addition to the kinetic contribution deriving from the band velocities. The occupation of these states of the light-driven material emerges as a steady state that is determined by dissipative processes balancing out the optical driving force. For low electric field strength we propose an intuitive explanation of the Hall current within a two-level Rabi picture.