Direct observation of the charging of a 2D electron gas through an incompressible strip in the quantum Hall regime

Details Direct observation of the charging of a 2D electron gas through an incompressible strip in the quantum Hall regime Direct observation of the charging of a 2D electron gas through an incompressible strip in the quantum Hall regime

2001-10-21

arxiv.org/abs/cond-mat/0110443v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, submitted to PRB Rapid Communications

Scientific paper

Using charge accumulation imaging, we measure the charge flow across an incompressible strip and follow its evolution with magnetic field. The strip runs parallel to the edge of a gate deposited on the sample and forms at positions where an exact number of integer Landau levels is filled. An RC model of charging fits the data well and enables us to determine the longitudinal resistance of the strip. Surprisingly, we find that the strip becomes more resistive as its width decreases.

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