Valence band barrier at (Ga,Mn)As/GaAs interfaces

Y. Ohno, I. Arata, F. Matsukura, H. Ohno

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


Transport properties of (Ga,Mn)As/GaAs/p-GaAs p-i-p diodes were studied to manifest the potential barrier in the valence band at (Ga,Mn)As/GaAs junctions. Spin injection into a nonmagnetic semiconductor was demonstrated by probing polarization of light emitted from (Ga,Mn)As/(In,Ga)As/n-GaAs p-i-n junctions. The temperature dependences of the current-voltage characteristics exhibited thermionic emission behaviors which gave the effective potential barrier height of 87-140 meV for holes injected from (GA,Mn)As to undoped GaAs.

Original languageEnglish
Pages (from-to)521-524
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number2-4
Publication statusPublished - 2002 Mar


  • Ferromagnetic semiconductor
  • Spin injection
  • Thermionic emission

ASJC Scopus subject areas

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


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