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Onset of interlayer phase coherence in a bilayer two-dimensional electron system: Effect of layer density imbalance

Spielman, I. B. and Kellogg, M. and Eisenstein, J. P. and Pfeiffer, L. N. and West, K. W. (2004) Onset of interlayer phase coherence in a bilayer two-dimensional electron system: Effect of layer density imbalance. Physical Review B, 70 (8). Art. No. 081303(R). ISSN 1098-0121. http://resolver.caltech.edu/CaltechAUTHORS:SPIprb04

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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 nu(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.


Item Type:Article
Additional Information:©2004 The American Physical Society. Received 2 June 2004; published 17 August 2004. We thank Allan MacDonald, Yogesh Joglekar, and Kun Yang for enlightening conversations. This work was supported by the NSF under Grant No. DMR-0242946 and the DOE under Grant No. DE-FG03-99ER45766.
Subject Keywords:two-dimensional electron gas; tunnelling; Landau levels; electron density
Record Number:CaltechAUTHORS:SPIprb04
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SPIprb04
Alternative URL:http://dx.doi.org/10.1103/PhysRevB.70.081303
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3219
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 May 2006
Last Modified:26 Dec 2012 08:53

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