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23 April 2024

» arxiv » cond-mat/0602271

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Two-subband quantum Hall effect in parabolic quantum wells
C. Ellenberger ; B. Simovic ; R. Leturcq ; T. Ihn ; S.E. Ulloa ; K. Ensslin ; D. C. Driscoll ; A. C. Gossard ;
Date:	10 Feb 2006
Subject:	Mesoscopic Systems and Quantum Hall Effect
Abstract:	The low-temperature magnetoresistance of parabolic quantum wells displays pronounced minima between integer filling factors. Concomitantly the Hall effect exhibits overshoots and plateau-like features next to well-defined ordinary quantum Hall plateaus. These effects set in with the occupation of the second subband. We discuss our observations in the context of single-particle Landau fan charts of a two-subband system empirically extended by a density dependent subband separation and an enhanced spin-splitting g*.
Source:	arXiv, cond-mat/0602271
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