Spin injection into a two-dimensional electron gas using inter-digital-ferromagnetic contacts

C. M. Hu, J. Nitta, A. Jensen, J. B. Hansen, H. Takayanagi, T. Matsuyama, D. Grundler, G. Meier, D. Heitmann, U. Merkt

Research output: Contribution to journalConference articlepeer-review

Abstract

We present a model that describes the spin injection across a single interface with two electrodes. The spin-injection rate across a typical hybrid junction made of ferromagnet (FM) and a two-dimensional electron gas (2DEG) is found at the percentage level. We perform spin-injection-detection experiment on devices with two ferromagnetic contacts on a 2DEG confined in an InAs quantum well. A spin-injection rate of 4.5% is estimated from the measured magnetoresistance.

Original languageEnglish
Pages (from-to)395-398
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume12
Issue number1-4
DOIs
Publication statusPublished - 2002 Jan
Externally publishedYes
Event14th International Conference on the - Prague, Czech Republic
Duration: 2001 Jul 302001 Aug 3

Keywords

  • Ferromagnet/semiconductor hybrid junction
  • Magnetoresistance
  • Spin injection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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