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Insulating phases of two-dimensional electrons in high Landau levels: Observation of sharp thresholds to conduction

Cooper, K. B. and Lilly, M. P. and Eisenstein, J. P. and Pfeiffer, L. N. and West, K. W. (1999) Insulating phases of two-dimensional electrons in high Landau levels: Observation of sharp thresholds to conduction. Physical Review B, 60 (16). R11285-R11288. ISSN 0163-1829. http://resolver.caltech.edu/CaltechAUTHORS:COOprb99

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Abstract

The intriguing re-entrant integer quantized Hall states recently discovered in high Landau levels of high-mobility 2D electron systems are found to exhibit extremely nonlinear transport. At small currents these states reflect insulating behavior of the electrons in the uppermost Landau level. At larger currents, however, a discontinuous and hysteretic transition to a conducting state is observed. These phenomena, found only in very narrow magnetic field ranges, are suggestive of the depinning of a charge density wave state, but other explanations can also be constructed.


Item Type:Article
Additional Information:© 1999 The American Physical Society. Received 25 June 1999. This work was supported by the National Science Foundation and the Department of Energy.
Record Number:CaltechAUTHORS:COOprb99
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:COOprb99
Alternative URL:http://dx.doi.org/10.1103/PhysRevB.60.R11285
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10931
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:18 Jun 2008
Last Modified:26 Dec 2012 10:06

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