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Spin transition in strongly correlated bilayer two-dimensional electron systems

Spielman, I. B. and Tracy, L. A. and Eisenstein, J. P. and Pfeiffer, L. N. and West, K. W. (2005) Spin transition in strongly correlated bilayer two-dimensional electron systems. Physical Review Letters, 94 (7). Art. No. 076803. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:SPIprl05

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Abstract

Using a combination of heat pulse and nuclear magnetic resonance techniques, we demonstrate that the phase boundary separating the interlayer phase coherent quantum Hall effect at nu(T)=1 in bilayer electron gases from the weakly coupled compressible phase depends upon the spin polarization of the nuclei in the host semiconductor crystal. Our results strongly suggest that, contrary to the usual assumption, the transition is attended by a change in the electronic spin polarization.


Item Type:Article
Additional Information:©2005 The American Physical Society. Received 4 October 2004; published 25 February 2005. We thank S. E. Barrett, S. Das Sarma, E. Demler, S.M. Girvin, B. Halperin, A. H. MacDonald, and A. Stern for helpful discussions. This work was supported by the NSF under Grant No. DMR-0242946 and the DOE under Grant No. DE-FG03-99ER45766.
Subject Keywords:aluminium compounds; gallium arsenide; III-V semiconductors; semiconductor quantum wells; two-dimensional electron gas; strongly correlated electron systems; nuclear magnetic resonance; electron spin polarisation
Record Number:CaltechAUTHORS:SPIprl05
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SPIprl05
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.94.076803
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3704
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:29 Jun 2006
Last Modified:26 Dec 2012 08:55

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