Compressible Phase of a Double-Layer Electron System with Total Landau-Level Filling Factor One-Half

Abstract

Following recent work of Halperin, Lee, and Read, and Kalmeyer and Zhang, a double-layer electron system with total Landau-level filling factor $\nu =1/2$ is mapped onto an equivalent system of fermions in zero average magnetic field interacting via a Chern-Simons gauge field. Within the random-phase approximation a new, low-lying, diffusive mode, not present in the $\nu =1/2$ single-layer system, is found. This mode leads to more singular low-energy scattering than appears in the single layer system, and to an attractive pairing interaction between fermions in different layers which grows stronger as the layer spacing is decreased. The possible connection between this pairing interaction and the experimentally observed fractional quantum Hall effect in double-layer systems is discussed.

13 pages, RevTex 3.0, NHMFL-93-0018

Cited by in corpus (31)

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• Double-Layer Systems at Zero Magnetic Field
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• Coulomb drag as a signature of the paired quantum Hall state
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• Spin-Singlet to Spin Polarized Phase Transition at $\nu =2/3$: Flux-Trading in Action
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• Pairing of Composite-Electrons and Composite-Holes in ${\nu }_T=1$ Quantum Hall Bilayers
• Semiclassical theory of the tunneling anomaly in partially spin-polarized compressible quantum Hall states
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