All-electrical production of spin-polarized currents in carbon nanotubes: rashba spin-orbit interaction
| Autor: | J. E. Alvarellos, Hernán Santos, Leonor Chico, Andrea Latge |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Graphene FOS: Physical sciences 02 engineering and technology Carbon nanotube Spin–orbit interaction 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences law.invention Magnetic field Planar law Impurity 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Chirality (chemistry) Spin-½ |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | We 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. Comment: Accepted to Physical Review B. 11 pages, 10 figures, 3 tables |
| Databáze: | OpenAIRE |
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