Spin generation away from boundaries by nonlinear transport
| Autor: | Ilya Finkler, Emmanuel I. Rashba, Hans-Andreas Engel, Bertrand I. Halperin |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Spin polarization Condensed matter physics Isotropy FOS: Physical sciences Conductivity Condensed Matter Physics Electronic Optical and Magnetic Materials Nonlinear system Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Spin Hall effect Electric current Anisotropy Spin-½ |
| Zdroj: | Physical Review B. 75 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.75.241202 |
| Popis: | Spin polarization may be generated far from the boundaries of a sample by nonlinear effects of an electric current, in the presence of "extrinsic" spin-orbit interactions, even when such generation is forbidden in the linear regime. We present a Corbino model where spin accumulation results from a combination of current gradients, nonlinearity, and cubic anisotropy. Further, we show that even with isotropic conductivity, nonlinear effects in a low-symmetry sidearm geometry can generate spin polarization far away from boundaries. Finally, we find that drift from the boundaries dominates spin polarization patterns observed in recent experiments on $\mathrm{GaAs}$ by Sih et al. [Phys. Rev. Lett. 97, 096605 (2006)]. |
| Databáze: | OpenAIRE |
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