Ramaglia, V. ; Bercioux, D. ; Cataudella, V. ; Filippis, G. ; Perroni, C.
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| Item type: | Article |
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| Journal or Publication Title: | Journal of Physics: Condensed Matter |
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| Volume: | 16 |
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| Page Range: | p. 9143 |
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| Date: | 2004 |
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| Institutions: | UNSPECIFIED |
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| Identification Number: | | Value | Type |
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| cond-mat/0403534 | arXiv ID |
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| Related URLs: | |
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| Dewey Decimal Classification: | 500 Science > 530 Physics |
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| Status: | Published |
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| Refereed: | Yes, this version has been refereed |
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| Created at the University of Regensburg: | Yes |
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| Item ID: | 1540 |
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Abstract
We demonstrate how the Rashba spin�orbit coupling in semiconductor heterostructures can produce and control a spin-polarized current without ferromagnetic leads. The 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 ...
Abstract
We demonstrate how the Rashba spin�orbit coupling in semiconductor heterostructures can produce and control a spin-polarized current without ferromagnetic leads. The 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. On 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 of realizing a spin-field-effect transistor based on the propagation of only one mode with the region with spin�orbit coupling, whereas the original Datta and Das device (1990 Appl. Phys. Lett. 56 665) uses the spin precession that originates from the interference between two modes with orthogonal spin.
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