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Vanishing Hall Resistance at High Magnetic Field in a Double-Layer Two-Dimensional Electron System

Kellogg, M. and Eisenstein, J. P. and Pfeiffer, L. N. and West, K. W. (2004) Vanishing Hall Resistance at High Magnetic Field in a Double-Layer Two-Dimensional Electron System. Physical Review Letters, 93 (3). Art. No. 036801. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:KELprl04

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Abstract

At total Landau level filling factor nutot = 1 a double-layer two-dimensional electron system with small interlayer separation supports a collective state possessing spontaneous interlayer phase coherence. This state exhibits the quantized Hall effect when equal electrical currents flow in parallel through the two layers. In contrast, if the currents in the two layers are equal, but oppositely directed, both the longitudinal and Hall resistances of each layer vanish in the low-temperature limit. This finding supports the prediction that the ground state at nutot = 1 is an excitonic superfluid.


Item Type:Article
Additional Information:©2004 The American Physical Society (Received 26 January 2004; published 12 July 2004) We thank A. H. MacDonald, S.M. Girvin, Z.Wang, and D. N. Sheng for enlightening conversations. This work was supported by the NSF under Grant No. DMR-0242946 and by the DOE under Grant No. DE-FG03-99ER45766.
Subject Keywords:quantum Hall effect; superfluidity; two-dimensional electron gas; Landau levels; excitons
Record Number:CaltechAUTHORS:KELprl04
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:KELprl04
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.93.036801
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3927
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:19 Jul 2006
Last Modified:26 Dec 2012 08:56

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