2014/09/08 by L. E. F. Foa Torres, P. M. Perez-Piskunow, C. A. Balseiro +1 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevlett.113.266801
published as Phys. Rev. Lett. 113, 266801 (2014) · 5 pages + 4 figures + suppl. material
arxiv created 2014/09/08 · arxiv updated 2014/12/24
We report on simulations of the dc conductance and quantum Hall response of a Floquet topological insulator using Floquet scattering theory. Our results reveal that laser-induced edge states in graphene lead to quantum Hall plateaus once imperfect matching with the non-illuminated leads is lessened. But the magnitude of the Hall plateaus is not directly related to the number and chirality of all the edge states at a given energy as usual. Instead, the plateaus are dominated only by those edge states adding to the dc density of states. Therefore, the dc quantum Hall conductance of a Floquet topological insulator is not directly linked to topological invariants of the full the Floquet bands.