Spin-polarized transport in a two-dimensional electron gas with interdigital-ferromagnetic contacts

C.-M. Hu, Junsaku Nitta, A. Jensen, J. B. Hansen, and Hideaki Takayanagi
Phys. Rev. B 63, 125333 – Published 13 March 2001
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Abstract

Ferromagnetic contacts on a high-mobility, two-dimensional electron gas (2DEG) in a narrow gap semiconductor with strong spin-orbit interaction are used to investigate spin-polarized electron transport. We demonstrate the use of magnetized contacts to preferentially inject and detect specific spin orientations. Spin dephasing and spin precession effects are studied by temperature and 2DEG channel length dependent measurements. Interdigital-ferromagnetic contacts suppress unwanted effects due to ferromagnetic microstrip inhomogeneities by averaging.

  • Received 24 July 2000

DOI:https://doi.org/10.1103/PhysRevB.63.125333

©2001 American Physical Society

Authors & Affiliations

C.-M. Hu1,2,*, Junsaku Nitta1, A. Jensen3, J. B. Hansen3, and Hideaki Takayanagi1

  • 1NTT Basic Research Laboratories, 3-1 Wakamiya, Morinosato, Atsugi-shi, Kanagawa 243-0198, Japan
  • 2Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany
  • 3Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark

  • *Email address: chu@physnet.uni-hamburg.de

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Issue

Vol. 63, Iss. 12 — 15 March 2001

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