The spin Hall effect is the effect of the deflection of electrons with antiparallel spins to opposite sides of a nonmagnetic conductor in the absence of an external magnetic field . Theoretically, it was predicted by M.I. Dyakonov and V.I. Perel in 1971.
Distinguish between external and internal spin effects of the Hall. The external spin Hall effect is observed in paramagnets and doped semiconductors . In them, electrons with one spin direction scatter perpendicular to the electric field , and with the opposite spin direction scatter to the other, similar to what happens with the anomalous Hall effect . That is, the main role is played by spin-dependent scattering by impurity fields. The internal spin effect was predicted by S. Murakami et al. In 2003 and, independently, by Sinova in 2004, who considered the motion of holes and a two-dimensional electron gas in semiconductors. For the internal spin effect, the deflection of current carriers with opposite current directions occurs due to the Rashba- type spin-orbit interaction .
In practice, the effect can be observed by injecting a spin-polarized current from a ferromagnet into a non-magnetic metal.
See also
- Hall Effect
- Quantum Hall Effect
Literature
- Heitmann, D. Quantum Materials, Lateral Semiconductor Nanostructures, Hybrid Systems and Nanocrystals. - Springer, 2010 .-- P. 307-309. - 434 p. - ISBN 9783642105524 .
- Sadamichi Maekawa. Concepts in spin electronics. - Oxford University Press, 2006. - Vol. 13. - P. 357-367. - 398 p. - (Series on semiconductor science and technology). - ISBN 9780198568216 .
Links
- The dynamics of polarization and depolarization of spins with the spin Hall effect . Nanotechnology community Nanometer.ru (January 6, 2009). Date of treatment September 1, 2011.
- Quantum spin Hall effect . Nanotechnology News Network (February 15, 2008). Date of treatment September 1, 2011. Archived on May 16, 2012.