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25 April 2024

» arxiv » cond-mat/9811143

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Scanned Potential Microscopy of Edge and Bulk Currents in the Quantum Hall Regime
Kent L. McCormick ; Michael T. Woodside ; Mike Huang ; Mingshaw Wu ; Paul McEuen ; Cem Duruoz ; J.S. Harris Jr ;
Date:	11 Nov 1998
Subject:	Mesoscopic Systems and Quantum Hall Effect \| cond-mat.mes-hall
Abstract:	Using an atomic force microscope as a local voltmeter, we measure the Hall voltage profile in a 2D electron gas in the quantum Hall (QH) regime. We observe a linear profile in the bulk of the sample in the transition regions between QH plateaus and a distinctly nonlinear profile on the plateaus. In addition, localized voltage drops are observed at the sample edges in the transition regions. We interpret these results in terms of theories of edge and bulk currents in the QH regime.
Source:	arXiv, cond-mat/9811143
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