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Evidence for quasi-classical transport of composite fermions in an inhomogeneous effective magnetic field

Smet, J ; Fleischmann, R ; Weiss, Dieter ; Ketzmerick, R ; Blick, R ; Lütjering, G ; Klitzing, K ; Geisel, T ; Weimann, G


We report on transverse magnetic focusing experiments in arrays of equidistant constrictions with centre-to-centre constriction spacings L varying from 500 nm to in the vicinity of the Landau level filling factor of a two-dimensional electron system. Provided the composite fermion mean free path is comparable to L, focusing is observed for both effective magnetic field directions. The ...


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