Spin polarization of electrons with Rashba double-refraction

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dc.creatorRamaglia, V. Marigliano
dc.creatorBercioux, D.
dc.creatorCataudella, V.
dc.creatorDe Filippis, G.
dc.creatorPerroni, C. A.
dc.date2004-03-22
dc.date2004-11-19
dc.date.accessioned2026-07-07T02:57:11Z
dc.date.available2026-07-07T02:57:11Z
dc.descriptionWe demonstrate how the Rashba spin-orbit coupling in semiconductor heterostructures can produce and control a spin-polarized current without ferromagnetic leads. Key idea is to use spin-double refraction of an electronic beam with a nonzero incidence angle. A region where the spin-orbit coupling is present separates the source and the drain without spin-orbit coupling. We show how the transmission and the beam spin-polarization critically depend on the incidence angle. The transmission halves when the incidence angle is greater than a limit angle and a significant spin-polarization appears. Increasing the spin-orbit coupling one can obtain the modulation of the intensity and of the spin-polarization of the output electronic current when the input current is unpolarized. Our analysis shows the possibility to realize a spin-field-effect transistor based on the propagation of only one mode with the region with spin-orbit coupling. Where the original Datta and Das device [Appl.Phys.Lett. {\bf 56}, 665 (1990)] use the spin-precession that originates from the interference between two modes with orthogonal spin.
dc.description12 pages with 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0403534
dc.identifierhttp://arxiv.org/abs/cond-mat/0403534
dc.identifierJ. Phys.: Condens. Matter 16 (2004) 9143-9154
dc.identifierdoi:10.1088/0953-8984/16/50/005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23569
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleSpin polarization of electrons with Rashba double-refraction
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