Light-induced fractional quantum Hall phases in graphene

ORAL

Abstract

Graphene has a special property that, under a strong magnetic field, its Landau levels are not equidistant. This propety allows one to selectively couple only two Landau levels, using a laser field resonant with their spacing. Such light-matter coupling results in a new form of bilayer fractional quantum Hall system, where the role of the layer is played by Landau level index and hopping between the layers is controlled by light-matter interaction strenght. We present the realizable fractional quantum Hall phases in these systems for 2/3 filling, and analyze the special type of interaction responsible for these phases. We also show that the form of the interaction distinguishes these systems from previously studied bilayer systems.

*Support was provided by the NSF grant EFRI-1542863

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Authors

  • Areg Ghazaryan

    • Physics Department, City College of the City University of New York, New York 10031

  • Michael Gullans

    • Joint Quantum Institute and Joint Center for Quantum Information and Computer Science, NIST and University of Maryland, College Park, Maryland 20742

  • Pouyan Ghaemi

    • Physics Department, City College of the City University of New York, New York 10031
    • City College of New York

  • Mohammad Hafezi

    • Department of Electrical and Computer Engineering, IREAP, and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742
    • University of Maryland
    • Univ of Maryland-College Park