Spin injection and detection in magnetic nanostructures

S. Takahashi, S. Maekawa

研究成果: Article査読

375 被引用数 (Scopus)

抄録

We study theoretically the spin transport in a nonmagnetic metal connected to ferromagnetic injector and detector electrodes. We derive a general expression for the spin accumulation signal which covers from the metallic to the tunneling regime. This enables us to discuss recent controversy on spin injection and detection experiments. Extending the result to a superconducting device, we find that the spin accumulation signal is strongly enhanced by opening of the superconducting gap since a gapped superconductor is a low carrier system for spin transport but not for charge. The enhancement is also expected in semiconductor devices.

本文言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
67
5
DOI
出版ステータスPublished - 2003 2 28

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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