Electrical spin injection in light emitting Schottky diodes based on InGaAs/GaAs QW heterostructures

N. V. Baidus, M. I. Vasilevskiy, M. J M Gomes, V. D. Kulakovskii, S. V. Zaitsev, M. V. Dorokhin, P. B. Demina, E. A. Uskova, B. N. Zvonkov

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review

Abstract

We demonstrate efficient hole spin injection from a ferromagnetic metal (Ni) contact in a forward biased light emitting Schottky diode (LESD) fabricated on a GaAs based heterostructure with a quantum well (QW). The spin polarization of injected holes was detected by measuring circular polarization of the electroluminescence (EL) from the near surface In-GaAs/GaAs QW. An intermediate gold layer has been used in order to improve the spin injection efficiency. Over 40% degree of circular polarization of the EL has been observed at T= 2 K for the LESD structure with Au-Ni-Au Schottky contact. © 2007 American Institute of Physics.
Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages1257-1258
Volume893
DOIs
Publication statusPublished - 2007
Externally publishedYes
Event28th International Conference on the Physics of Semiconductors (ICPS 2006) - Vienna, Austria
Duration: 24 Jul 200628 Jul 2006

Publication series

Name
Volume893
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference28th International Conference on the Physics of Semiconductors (ICPS 2006)
PlaceAustria
CityVienna
Period24/07/0628/07/06

Research Keywords

  • Hole spin injection
  • Quantum well
  • Schottky diode

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