Spin polarized electric currents in semiconductor heterostructures induced by microwave radiation

Details Spin polarized electric currents in semiconductor heterostructures induced by microwave radiation Spin polarized electric currents in semiconductor heterostructures induced by microwave radiation

2010-09-16

arxiv.org/abs/1009.3177v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 4 figures

Scientific paper

We report on microwave (mw) radiation induced electric currents in (Cd,Mn)Te/(Cd,Mg)Te and InAs/(In,Ga)As quantum wells subjected to an external in-plane magnetic field. The current generation is attributed to the spin-dependent energy relaxation of electrons heated by mw radiation. The relaxation produces equal and oppositely directed electron flows in the spin-up and spin-down subbands yielding a pure spin current. The Zeeman splitting of the subbands in the magnetic field leads to the conversion of the spin flow into a spin-polarized electric current.

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