Magnetic Focusing of Composite Fermions through Arrays of Cavities

J. H. Smet, D. Weiss, R. H. Blick, G. Lütjering, K. von Klitzing, R. Fleischmann, R. Ketzmerick, T. Geisel, and G. Weimann
Phys. Rev. Lett. 77, 2272 – Published 9 September 1996
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Abstract

The magnetoresistance Rxx was investigated in arrays of abutted square cavities with lengths L ranging from 500nm to 1.2μm near filling factor ν=1/2. Maxima in Rxx occur for effective magnetic field values satisfying the magnetic focusing condition between the cavity spacing and the cyclotron radius of composite fermions, also for the effective magnetic field direction when composite fermions are deflected in the direction opposite to that of electrons. The experimental data are compared with simulation results based on a quasiclassical dynamics of composite fermions in soft potentials.

  • Received 9 February 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.2272

©1996 American Physical Society

Authors & Affiliations

J. H. Smet, D. Weiss, R. H. Blick, G. Lütjering, and K. von Klitzing

  • Max-Planck Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

R. Fleischmann, R. Ketzmerick, and T. Geisel

  • Institut für Theoretische Physik und SFB Nichtlineare Dynamik, Universität Frankfurt, D-60054 Frankfurt/Main, Germany

G. Weimann

  • Fraunhofer Institut für Angewandte Festkörperphysik, D-79108 Freiburg, Germany

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Issue

Vol. 77, Iss. 11 — 9 September 1996

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