Spin photovoltaic effect in quantum wires with Rashba interaction

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Applied Physics Letters, ISSN: 0003-6951, Vol: 86, Issue: 21, Page: 1-3

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Pershin, Yuriy V, Dr; Piermarocchi, Carlo
AIP Publishing
Physics and Astronomy; photovoltaic effects; semiconductor quantum wires; spin-orbit interactions; spin polarized transport; photoconductivity; high-frequency effects; Physics
article description
We propose a mechanism for spin-polarized photocurrent generation in quantum wires. The effect is due to the combined effect of Rashba spin-orbit interaction, external magnetic field, and microwave radiation. The time-independent interactions in the wire give rise to a spectrum asymmetry in k space. The microwave radiation induces transitions between spin-splitted subbands, and, due to the peculiar energy dispersion relation, charge and spin currents are generated at zero-bias voltage. We demonstrate that the generation of pure spin currents is possible under an appropriate choice of external control parameters. © 2005 American Institute of Physics.