Spin injection and detection in magnetic nanostructures

By S. Takahashi, S. Maekawa. 2002

370 citations recorded by the source corpus.

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.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/081260186fd7f72d74148acf91d6146d3b070ac1

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In Atomic and Molecular Physics, and Optics

In Condensed Matter Physics

Citations in the corpus

Spintronics: Fundamentals and applications (2004, neutral): “This is no longer possible for a more complicated geometry (Takahashi and Maekawa, 2003).”
Interface-Induced Phenomena in Magnetism (2016, positive): “For spin injection, conductivity mismatch is an issue for both semiconductors and metals [Schmidt et al., 2000; Takahashi and Maekawa, 2003], often resolved by insertion of a (spin-conserving) tunnel barrier at the ferromagnet/non-magnet interface.”
Colloquium : Nonequilibrium effects in superconductors with a spin-splitting field (2017, background): “In the absence of spin splitting, the spin-dependent part of Idet is determined only by the fT3 mode related to the spin-dependent chemical potential shift (Morten et al., 2004, 2005; Takahashi and Maekawa, 2003) (see Eq.”