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

Abstract

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.

4 pages, 5 figures

References in corpus (2)

• Topographic Mapping of the Quantum Hall Liquid using a Few-Electron Bubble
• Scanned Potential Microscopy of Edge States in a Quantum Hall Liquid

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• Local Interlayer Tunneling Between Two-Dimensional Electron Systems in the Ballistic Regime