Real and imaginary edge states in stacked Floquet honeycomb lattices Alexander Fritzsche, Bastian Höckendorf, Andreas Alvermann and Holger Fehske Eur. Phys. J. B, 93 8 (2020) 151 Published online: 05 August 2020 DOI: 10.1140/epjb/e2020-10233-0