1. Graphene nanoring as a tunable source of polarized electrons
- Author
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J. Munárriz, Francisco Domínguez-Adame, Andrey V. Malyshev, and Pedro A. Orellana
- Subjects
FOS: Physical sciences ,Electrons ,Bioengineering ,Electron ,law.invention ,law ,Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ,Nanotechnology ,Scattering, Radiation ,Computer Simulation ,General Materials Science ,Electrical and Electronic Engineering ,Physics ,Condensed Matter - Mesoscale and Nanoscale Physics ,Spin polarization ,Magnetic moment ,Condensed matter physics ,Graphene ,Física de materiales ,Mechanical Engineering ,Equipment Design ,General Chemistry ,Surface Plasmon Resonance ,Polarization (waves) ,Equipment Failure Analysis ,Magnetic Fields ,Models, Chemical ,Ferromagnetism ,Mechanics of Materials ,Computer-Aided Design ,Nanoparticles ,Graphite ,Condensed Matter::Strongly Correlated Electrons ,Electric current ,Nanoring - Abstract
We propose a novel spin filter based on a graphene nanoring fabricated above a ferromagnetic strip. The exchange interaction between the magnetic moments of the ions in the ferromagnet and the electron spin splits the electronic states, and gives rise to spin polarization of the conductance and the total electric current. We demonstrate that both the current and its polarization can be controlled by a side-gate voltage. This opens the possibility to use the proposed device as a tunable source of polarized electrons., Comment: 12 pages, 7 figures, accepted in Nanotechnology
- Published
- 2012