Drift and Diffusion of Spins Generated by the Spin Hall Effect

Details Drift and Diffusion of Spins Generated by the Spin Hall Effect Drift and Diffusion of Spins Generated by the Spin Hall Effect

2007-06-28

arxiv.org/abs/0706.4273v1

Appl. Phys. Lett. 91, 062109 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 3 figures

Scientific paper

10.1063/1.2768633

Electrically generated spin accumulation due to the spin Hall effect is imaged in n-GaAs channels using Kerr rotation microscopy, focusing on its spatial distribution and time-averaged behavior in a magnetic field. Spatially-resolved imaging reveals that spin accumulation observed in transverse arms develops due to longitudinal drift of spin polarization produced at the sample boundaries. One- and two-dimensional drift-diffusion modeling is used to explain these features, providing a more complete understanding of observations of spin accumulation and the spin Hall effect.

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