Spin transport and relaxation in superconductors

T. Yamashita, S. Takahashi, H. Imamura, S. Maekawa

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We study theoretically the effect of spin relaxation on the spin transport in a ferromagnet/superconductor (FM/SC) tunnel junction. When spin-polarized electrons are injected into the SC from the FM, nonequilibrium spin accumulation as well as spin current are created in the range of the spin diffusion length in the SC. We find that the spin diffusion length in the superconducting state is the same as that in the normal state. We examine a FM/SC/SC double tunnel junction, and show that the spin current is detected by the Joule heat generated at the Josephson junction. This provides a method to obtain the spin diffusion length by probing the spin current in SC's.

Original languageEnglish
Article number172509
Pages (from-to)1725091-1725094
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number17
Publication statusPublished - 2002 May 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Yamashita, T., Takahashi, S., Imamura, H., & Maekawa, S. (2002). Spin transport and relaxation in superconductors. Physical Review B - Condensed Matter and Materials Physics, 65(17), 1725091-1725094. [172509].