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Enhanced Soft Wall Effects for Composite Fermions in Magnetic Focusing and Commensurability Experiments

Smet, J ; Weiss, Dieter ; Klitzing, K ; Fleischmann, R ; Ketzmerick, R ; Geisel, T ; Wegscheider, Werner ; Coleridge, P ; Wasilewski, Z ; Weimann, G



Abstract

The dynamics of composite fermions in the ballistic transport regime in etched semiconductor nanostructures, imposed on a two-dimensional electron gas, has been investigated around half Landau level filling. The non-uniform electrostatic potential in the vicinity of soft walls in such etched nanostructures has a strong repercussion on the trajectories described by the quasi-particles. A ...

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