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Published December 18, 2009 | Published
Journal Article Open

Interlayer Coherent Composite Fermi Liquid Phase in Quantum Hall Bilayers


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.

Additional Information

© 2009 The American Physical Society. Received 26 August 2009; published 17 December 2009. It is a pleasure to acknowledge illuminating discussions with G. Chen, J. Eisenstein, Y.-B. Kim, D. Luhman, M. Milovanovic, G. Moller, and Y. Zou.We also acknowledge support from the Lee A. DuBridge Foundation (J. A), the A. P. Sloan Foundation (O. I. M), the Packard Foundation (G. R), and the NSF through Grants No. DMR- 0529399 (M. P. A. F), No. PHY-0456720, and No. PHY-0803371 (G. R).

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Published - Alicea2009p6689Phys_Rev_Lett.pdf


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