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Proceedings Paper

Generation of pure spin currents in a single electron transistor with a superconducting island
Author(s): Marius V. Costache; Sergio O. Valenzuela
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Paper Abstract

We describe a spin filter at the single-electron level that produces pure spin currents with no net bias. Our device is based on the ground-state energetics of a single-electron transistor comprising a superconducting island connected to normal leads via tunnel barriers with different resistances that break spatial symmetry. The current has opposite spin polarization when the current is reversed, which leads to a dc spin current when applying an alternating charge current with zero mean, as expected in a spin ratchet. We demonstrate spin transport and quantify the spin ratchet efficiency by means of ferromagnetic leads with known spin polarization.

Paper Details

Date Published: 15 September 2011
PDF: 11 pages
Proc. SPIE 8100, Spintronics IV, 81000I (15 September 2011); doi: 10.1117/12.890231
Show Author Affiliations
Marius V. Costache, Catalan Institute of Nanotechnology (Spain)
Sergio O. Valenzuela, Catalan Institute of Nanotechnology (Spain)
Institució Catalana de Recerca i Estudis Avançats (Spain)
Univ. Autonoma de Barcelona (Spain)

Published in SPIE Proceedings Vol. 8100:
Spintronics IV
Henri-Jean M. Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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