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Onset of Interlayer Phase Coherence in a Bilayer Two-Dimensional Electron System: Effect of Layer Density Imbalance

I. B. Spielman·M. Kellogg·J. P. Eisenstein·L. N. Pfeiffer·K. W. West
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Abstract

Tunneling and Coulomb drag are sensitive probes of spontaneous interlayer phase coherence in bilayer two-dimensional electron systems at total Landau level filling factor $ν_T = 1$. We find that the phase boundary between the interlayer phase coherent state and the weakly-coupled compressible phase moves to larger layer separations as the electron density distribution in the bilayer is imbalanced. The critical layer separation increases quadratically with layer density difference.

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I. B. Spielman, M. Kellogg, J. P. Eisenstein, L. N. Pfeiffer, K. W. West. 2004-06-02. Onset of Interlayer Phase Coherence in a Bilayer Two-Dimensional Electron System: Effect of Layer Density Imbalance. https://doi.org/10.1103/physrevb.70.081303

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