Abstract
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 language | English |
|---|---|
| Title of host publication | Spin Current |
| Publisher | Oxford University Press |
| Pages | 15-22 |
| Number of pages | 8 |
| ISBN (Print) | 9780198787075 |
| DOIs | |
| Publication status | Published - 2017 Dec 21 |
Keywords
- Charge currents
- Electrochemical potential
- Pure spin currents
- Spin accumulation
- Spin diffucion equation
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Cite this
Ando, K., & Saitoh, E. (2017). Incoherent spin current. In Spin Current (pp. 15-22). Oxford University Press. https://doi.org/10.1093/oso/9780198787075.003.0002