Imaging Inter-Edge State Scattering Centers in the Quantum Hall Regime

Details Imaging Inter-Edge State Scattering Centers in the Quantum Hall Regime Imaging Inter-Edge State Scattering Centers in the Quantum Hall Regime

2000-02-25

arxiv.org/abs/cond-mat/0002391v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevB.64.041310

We use an atomic force microscope tip as a local gate to study the scattering between edge channels in a 2D electron gas in the quantum Hall regime. The scattering is dominated by individual, microscopic scattering centers, which we directly image here for the first time. The tip voltage dependence of the scattering indicates that tunneling occurs through weak links and localized states.

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