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All-electrical production of spin-polarized currents in carbon nanotubes: rashba spin-orbit interaction

AuthorsSantos, Hernán; Latgé, A.; Alvarellos, J. E.; Chico, Leonor
Issue Date18-Apr-2016
PublisherAmerican Physical Society
CitationPhysical Review - Section B - Condensed Matter 93(16): 165424 (2016)
AbstractWe study the effect of the Rashba spin-orbit interaction in the quantum transport of carbon nanotubes with arbitrary chiralities. For certain spin directions, we find a strong spin-polarized electrical current that depends on the diameter of the tube, the length of the Rashba region, and on the tube chirality. Predictions for the spin-dependent conductances are presented for different families of achiral and chiral tubes. We have found that different symmetries acting on spatial and spin variables have to be considered in order to explain the relations between spin-resolved conductances in carbon nanotubes. These symmetries are more general than those employed in planar graphene systems. Our results indicate the possibility of having stable spin-polarized electrical currents in absence of external magnetic fields or magnetic impurities in carbon nanotubes.
Publisher version (URL)https://doi.org/10.1103/PhysRevB.93.165424
Identifiersdoi: 10.1103/PhysRevB.93.165424
e-issn: 1550-235X
issn: 1098-0121
Appears in Collections:(ICMM) Artículos
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