Dresden 2020 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 13: Graphene (joint session TT/DY/HL)
TT 13.11: Vortrag
Montag, 16. März 2020, 17:45–18:00, HSZ 201
Geometric-dissipative origin of the light-induced Hall current in graphene I — •Marlon Nuske1,3, Lukas Broers1, and Ludwig Mathey1,2,3 — 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.