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A: Fachverband Atomphysik

A 6: Interaction with strong or short laser pulses II

A 6.4: Talk

Tuesday, March 15, 2022, 11:30–11:45, A-H1

High-harmonic generation in finite Haldanite flakes — •Christoph Jürß and Dieter Bauer — Institute of Physics, University of Rostock

In topological insulators, edge states are important for the electron dynamics. The edge states allow a dissipation-less transport of electric current, whereas the bulk is an insulator. In this work, we investigate the contribution of the edge states to the high-order harmonic generation in the Haldane model. Finite "Haldanite" flakes of different sizes are considered. Compared to the spectrum for the respective bulk system, the finite flakes show several additional peaks in the energy region below the band-gap between valence and conduction band. We find that some peaks depend on the flake size. This talk focuses on the origin of this size dependency.