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Nonparabolic confinement in quantum wire superlattices

H. Drexler, W. Hansen, J. P. Kotthaus, M. Holland, and S. P. Beaumont
Phys. Rev. B 46, 12849(R) – Published 15 November 1992
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Abstract

The high-frequency polarizability of quantum wires in a novel metal-insulator-semiconductor field-effect transistor heterojunction is studied in the far-infrared regime. Whereas on conventional narrow quantum wires only the fundamental mode of the dimensional resonance is observed, the quantum wires investigated here exhibit higher harmonics. Additionally, at high electron densities and intermediate magnetic fields we observe a completely unexpected splitting of the fundamental mode. The behavior is discussed in view of nonparabolic confinement as well as interwire interaction.

  • Received 8 July 1992

DOI:https://doi.org/10.1103/PhysRevB.46.12849

©1992 American Physical Society

Authors & Affiliations

H. Drexler, W. Hansen, and J. P. Kotthaus

  • Sektion Physik, Universität München, Geschwister-Scholl-Platz 1, 8000 München 22, Germany

M. Holland and S. P. Beaumont

  • Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow G128QQ, United Kingdom

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Issue

Vol. 46, Iss. 19 — 15 November 1992

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