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Composite fermions traversing a potential barrier

L. Brey·C. Tejedor
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Abstract

Using a composite fermion picture, we study the lateral transport between two two-dimensional electron gases, at filling factor 1/2, separated by a potential barrier. In the mean field approximation, composite fermions far from the barrier do not feel a magnetic field while in the barrier region the effective magnetic field is different from zero. This produces a cutoff in the conductance when represented as a function of the thickness and height of the barrier. There is a range of barrier heights for which an incompressible liquid, at $ν=1/3$, exists in the barrier region.

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L. Brey, C. Tejedor. 1995-05-31. Composite fermions traversing a potential barrier. https://doi.org/10.1103/physrevb.51.17259

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