Scanned Potential Microscopy of Edge States in a Quantum Hall Liquid

Abstract

Using a low-temperature atomic force microscope as a local voltmeter, we measure the Hall voltage profile in a quantum Hall conductor in the presence of a gate-induced non-equilibrium edge state population at n=3. We observe sharp voltage drops at the sample edges which are suppressed by re-equilibrating the edge states.

4 pages, 4 figs. To be published in Physica E (Proceedings of the 13th International Conference on the Properties of 2D Systems)

References in corpus (2)

• Subsurface charge accumulation imaging of a quantum Hall liquid
• Scanned Potential Microscopy of Edge and Bulk Currents in the Quantum Hall Regime

Cited by in corpus (3)

• Imaging Inter-Edge State Scattering Centers in the Quantum Hall Regime
• Cryogenic scanning force microscopy of quantum Hall samples: Adiabatic transport originating in anisotropic depletion at contact interfaces
• Low Temperature Electrostatic Force Microscopy of a Deep Two Dimensional Electron Gas using a Quartz Tuning Fork