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Phys Rev Lett. 2004 Mar 26;92(12):126603. Epub 2004 Mar 25.

Universal intrinsic spin Hall effect.

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Department of Physics, Texas A&M University, College Station, Texas 77843-4242, USA.


We describe a new effect in semiconductor spintronics that leads to dissipationless spin currents in paramagnetic spin-orbit coupled systems. We argue that in a high-mobility two-dimensional electron system with substantial Rashba spin-orbit coupling, a spin current that flows perpendicular to the charge current is intrinsic. In the usual case where both spin-orbit split bands are occupied, the intrinsic spin-Hall conductivity has a universal value for zero quasiparticle spectral broadening.

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