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Generation of pure spin currents in a single electron transistor with a superconducting island

AuthorsCostache, Marieta; Valenzuela, Sergio O.
Issue Date2011
PublisherThe International Society for Optics and Photonics
CitationProceedings of SPIE 8100: 81000I (2011)
AbstractWe 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.
DescriptionTrabajo presentado al "Spintronics IV" celebrado en California (US) el 21 de agosto de 2011.
Publisher version (URL)http://dx.doi.org/10.1117/12.890231
Identifiersdoi: 10.1117/12.890231
issn: 0277-786X
e-issn: 1996-756X
Appears in Collections:(CIN2) Artículos
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