Ultrafast extrinsic spin-Hall currents

Details Ultrafast extrinsic spin-Hall currents Ultrafast extrinsic spin-Hall currents

2006-06-28

arxiv.org/abs/cond-mat/0606725v1

Research Paper, Solid State Commun. 139, 439 (2006)

Physics

Condensed Matter

Other Condensed Matter

18 pages, 3 figures

Scientific paper

10.1016/j.ssc.2006.07.009

We consider the possibility of ultrafast extrinsic spin-Hall currents, generated by skew scattering following the optical injection of charge or pure spin currents. We propose a phenomenological model for this effect in quantum well structures. An injected charge current leads to a spin-Hall-induced pure spin current, and an injected pure spin current leads to a spin-Hall-induced charge current. The resulting spin or charge accumulation can be measured optically.

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