Incoherent spin current

K. Ando, E. Saitoh

Research output: Chapter in Book/Report/Conference proceedingChapter


This chapter introduces the concept of incoherent spin current. A diffusive spin current can be driven by spatial inhomogeneous spin density. Such spin flow is formulated using the spin diffusion equation with spin-dependent electrochemical potential. The chapter also proposes a solution to the problem known as the conductivity mismatch problem of spin injection into a semiconductor. A way to overcome the problem is by using a ferromagnetic semiconductor as a spin source; another is to insert a spin-dependent interface resistance at a metal-semiconductor interface.

Original languageEnglish
Title of host publicationSpin Current
PublisherOxford University Press
Number of pages8
ISBN (Print)9780198787075
Publication statusPublished - 2017 Dec 21


  • Charge currents
  • Electrochemical potential
  • Pure spin currents
  • Spin accumulation
  • Spin diffucion equation

ASJC Scopus subject areas

  • General Physics and Astronomy


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