Magnetic Field Control of Electron Motion in Molecular Nanostructures: Steplike Behavior and Spin Polarization of a Bridge-Assisted Interelectrode Current

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Abstract
Anomalies in low-temperature behavior are predicted for the tunneling current through a molecular wire connecting two microelectrodes. Applying an external magnetic field the possibility of spin filtration and spin polarization of the current is demonstrated for a wire in which paramagnetic ions have been embedded. A transfer blocking is obtained for incoming spin-down polarized electrons as well as a separation of incoming spin-up polarized electrons into a definite ratio of outgoing spin-up and spin-down electrons.