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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.


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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