Transverse magnetic focusing and spin-dependent reflection experiments in InSb- and InAs-based heterostructures

ORAL

Abstract

We report on mesoscopic spin-dependent ballistic transport in InSb/InAlSb and InAs/AlGaSb heterostructures, characterized by strong spin-orbit interaction. Spin-orbit interaction in two-dimensional electron systems can lead to spin-splitting in semiclassical ballistic trajectories and in spin-dependent reflection of carriers. We experimentally demonstrate the spin reflection in open and closed ballistic geometries optimizing scattering off a lithographic barrier. Further, experimentally obtained transverse magnetic focusing spectra can be interpreted as demonstrating both spin-split ballistic transport and spin-dependent reflection for higher order peaks involving carrier reflection off the barrier. NSF DMR-0094055 (JJH), DMR-0080054, DMR-0209371 (MBS).

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Authors

  • Hong Chen

  • J.J. Heremans

    • Department of Physics, Virginia Tech

  • J.A. Peters

  • J.T. Beardsley

    • Department of Physics and Astronomy, Ohio University

  • N. Goel

  • S.J. Chung

  • M.B. Santos

    • Department of Physics and Astronomy, University of Oklahoma

  • W. Van Roy

  • G. Borghs

    • IMEC, Leuven, Belgium