One-way transport in laser-illuminated bilayer graphene: A Floquet isolator

We explore the Floquet band-structure and electronic transport in laser-illuminated bilayer graphene. By using a bias voltage perpendicular to the graphene bilayer we show how to get one-way charge and valley transport among two unbiased leads. In contrast to quantum pumping, our proposal uses a dif...

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Bibliographic Details
Published inarXiv.org
Main Authors Lago, Virginia Dal, Morell, Eric Suárez, Torres, Luis E. F. Foa
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 10.08.2017
Subjects
Bilayers
Charge transport
Electron transport
Graphene
Physics - Mesoscale and Nanoscale Physics
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Summary:We explore the Floquet band-structure and electronic transport in laser-illuminated bilayer graphene. By using a bias voltage perpendicular to the graphene bilayer we show how to get one-way charge and valley transport among two unbiased leads. In contrast to quantum pumping, our proposal uses a different mechanism based on generating a non-reciprocal bandstructure with a built-in directionality. The Floquet states at one edge of a graphene layer become hybridized with the continuum on the other layer, and so the resulting bandstructure allows for one-way transport as in an \textit{isolator}. Our proof-of-concept may serve as a building block for devices exploiting one-way states.
ISSN:2331-8422
DOI:10.48550/arxiv.1708.03304