SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 9: Poster Session: Correlated Electrons
TT 9.8: Poster
Dienstag, 28. September 2021, 13:30–16:00, P
Floquet renormalization group approach to the periodically driven Kondo model — •Valentin Bruch1, Mikhail Pletyukhov1, Herbert Schoeller1, and Dante Kennes1,2 — 1Institute for Theory of Statistical Physics, RWTH Aachen, 52056 Aachen, Germany and JARA-FIT, 52056 Aachen — 2Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science, 22761 Hamburg, Germany
We study the interplay of strong correlations and coherent driving by considering the Kondo model driven by a time-periodic bias voltage. By combining a recent nonequilibrium renormalization group method with Floquet theory, we find that the coherent dressing of the driving field leads to side-replicas of the Kondo resonance in the conductance, which are not completely washed out by the decoherence induced by the driving. We show that to accurately capture the interplay of driving and strong correlations one needs to go beyond simple phenomenological pictures, which underestimate decoherence, or adiabatic approximations, highlighting the relevance of memory effects. Within our method the differential conductance shows good quantitative agreement with experimental data in the full crossover regime from weak to strong driving. In the time-resolved current and differential conductance we identify nonlinear memory effects and time scales of the relaxation to the ground state.