Multiterminal conductance of a floquet topological insulator
Date
2014Author
Foa Torres, Luis Eduardo Francisco
Pérez Piskunow, Pablo Matías
Balseiro, Carlos A.
Usaj, Gonzalo
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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 lead to quantum Hall plateaus once imperfect matching with the nonilluminated leads is lessened. The magnitude of the Hall plateaus, however, 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 by those edge states adding to the time-averaged density of states. Therefore, the dc quantum Hall conductance of a Floquet topological insulator is not directly linked to topological invariants of the full Floquet bands.
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Foa Torres, L. E. F., Pérez Piskunow, P. M., Balseiro, C. A. y Usaj, G. (2014). Multiterminal conductance of a floquet topological insulator. Physical Review Letters, 113 (26), 266801. https://doi.org/10.1103/PhysRevLett.113.266801