Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 68: Topology: Other Topics
TT 68.11: Vortrag
Freitag, 5. April 2019, 12:15–12:30, H22
Chiral 1D Floquet topological insulators beyond rotating wave approximation — Dante M. Kennes1, •Niclas Müller2, Mikhail Pletyukhov2, Clara Weber2, Christoph Bruder3, Fabian Hassler4, Jelena Klinovaja3, Daniel Loss3, and Herbert Schoeller2 — 1Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany — 2Institut für Theorie der Statistischen Physik, RWTH Aachen, 52062 Aachen, Germany and JARA - Fundamentals of Future Information Technology — 3Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056, Switzerland — 4JARA-Institute Quantum Information, RWTH Aachen University, 52062 Aachen, Germany
We study one-dimensional (1D) Floquet topological insulators with chiral symmetry going beyond the standard rotating wave approximation. The occurrence of many anticrossings between Floquet replicas leads to a dramatic extension of phase diagram regions with stable topological edge states (TESs). We present an explicit construction of all TESs in terms of a truncated Floquet Hamiltonian in frequency space, prove the bulk-boundary correspondence, and analyze the stability of the TESs in terms of their localization lengths. We propose experimental tests of our predictions in curved bilayer graphene.