Multiterminal Conductance of a Floquet Topological Insulator

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....

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Bibliographic Details
Published inarXiv.org
Main Authors L E F Foa Torres, Perez-Piskunow, P M, Balseiro, C A, Usaj, G
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 08.09.2014
Subjects
Chirality
Graphene
Physics - Mesoscale and Nanoscale Physics
Physics - Quantum Physics
Quantum theory
Resistance
Topological insulators
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1409.2482