Composite fermions traversing a potential barrier

Details Composite fermions traversing a potential barrier Composite fermions traversing a potential barrier

1995-05-31

arxiv.org/abs/cond-mat/9505152v1

Physics

Condensed Matter

3 pages, latex, 4 figures available upon request from brey@marlene.fmc.uam.es. To appear in Physical Review B (RC) June 15th

Scientific paper

10.1103/PhysRevB.51.17259

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 $\nu =1/3$, exists in the barrier region.

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