Interlayer Coherent Composite Fermi Liquid Phase in Quantum Hall Bilayers

Jason Alicea, Olexei I. Motrunich, G. Refael, and Matthew P. A. Fisher
Phys. Rev. Lett. 103, 256403 – Published 17 December 2009

Abstract

We introduce an interlayer coherent composite Fermi liquid for ν=1/2+1/2 bilayers, in which interlayer Coulomb repulsion drives exciton condensation of composite fermions. As a result, composite fermions propagate coherently between layers—even though electrons do not—and form bonding and antibonding Fermi seas. This phase is compressible with respect to symmetric currents but quantum Hall-like in the counterflow channel. Quantum oscillations of the composite Fermi seas generate a new series of incompressible states at ν=p/[2(p±1)] per layer (p an integer), which is a bilayer analogue of Jain’s sequence.

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  • Received 26 August 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.256403

©2009 American Physical Society

Authors & Affiliations

Jason Alicea1, Olexei I. Motrunich1, G. Refael1, and Matthew P. A. Fisher2

  • 1Department of Physics, California Institute of Technology, Pasadena, California 91125, USA
  • 2Microsoft Research, Station Q, University of California, Santa Barbara, California 93106, USA

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Issue

Vol. 103, Iss. 25 — 18 December 2009

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